document.write( "Question 490731: I need to pass the real test. So can someone please tell me if i got these questions wrong or right.
\n" );
document.write( "it will really be a BIG help.\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "Questions 1-3 Simplify the expression:\r
\n" );
document.write( "\n" );
document.write( "1. x2-4x+4(x2+2x-5) Answer: 5x2+12x-20
\n" );
document.write( "2. 5x2+4x-6(3x2-2) Answer: -13x2+4x-12
\n" );
document.write( "3. x2(4x-x+6) Answer: 3x2+6
\n" );
document.write( "Multiply the binomials:
\n" );
document.write( "4. (a+b)(a-b) Answer: a2-b2
\n" );
document.write( "Questions Multiply 5-9:
\n" );
document.write( "5. (4a+x)(3a-x) Answer: 12a2+7ax-x2
\n" );
document.write( "6. h2(5h+4) Answer: 5h3+4h2
\n" );
document.write( "7. (x+3)2 Answer: x2+9
\n" );
document.write( "8. (d-5)2 Answer: d2-25
\n" );
document.write( "9. (2x2)(x+4)(x-4) Answer: 2x4-16
\n" );
document.write( "11. To graphically solve the quadratic equation x2+3x-10=5. Answer: Use the quadratic formula, letting a=1, b=3, and c=-15.
\n" );
document.write( "12. If the garden box has dimensions x by x feet and an area in square feet equal to the perimeter in feet, what is the value for x that satisfies the requirements? (Hint: The box is square.) Answer: There is not enough information in the problem.
\n" );
document.write( "13. Given three consecutive integers with a sum of four times the second number, write an algebraic equation for this situation. Answer: 3n+3=4n
\n" );
document.write( "14. Factor the trinomial b2-b-6. Answer: (b+3)(b-2)
\n" );
document.write( "15. Factor the binomial x2-64. Answer: (x-8)(x+8)
\n" );
document.write( "16. Factor the binomial 9a2-16. Answer: (3a-4)(3a+4)
\n" );
document.write( "17. Factor the equation x2=x+20. Answer: (x+5)(x+4)
\n" );
document.write( "18. Solve the equation x2+5x-4=0 using the quadratic formula. Answer: x=.702 and -5.702
\n" );
document.write( "19.Solve the equation 3m2+6m=3 using the quadratic formula. Answer: x=2.5 and -14.5
\n" );
document.write( "Questions 20-21 write the value of the discriminant of each equation, decide how many different real-number roots the equation has, and determine how many points the parabola will interact with the x-axis. Do not solve the equation.
\n" );
document.write( "20. x2+7x+9=0 Answer: Discriminant is 13,indicating there are two real roots, with the parabola intersecting the x-axis at two points.
\n" );
document.write( "21. 2x2+5x+7=0 Answer: Discriminant is -31, indicating there are no real roots, with the parabola not intersecting the x-axis at all. Thanks :C \n" );
document.write( "
Algebra.Com's Answer #334264 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Questions 1-3 Simplify the expression: \n" ); document.write( "1. x2-4x+4(x2+2x-5) Answer: 5x2+12x-20 \n" ); document.write( "That can't be right. Are you supposed to multiply? \n" ); document.write( "-------------- \n" ); document.write( "2. 5x2+4x-6(3x2-2) Answer: -13x2+4x-12 \n" ); document.write( "Same as #1 \n" ); document.write( "----------- \n" ); document.write( "3. x2(4x-x+6) Answer: 3x2+6 \n" ); document.write( "Same as #1 \n" ); document.write( "------------ \n" ); document.write( "Multiply the binomials: \n" ); document.write( "4. (a+b)(a-b) Answer: a2-b2 \n" ); document.write( "= \n" ); document.write( "---------------- \n" ); document.write( "Questions Multiply 5-9: \n" ); document.write( "5. (4a+x)(3a-x) Answer: 12a2+7ax-x2 \n" ); document.write( "It's -4ax and + 3ax \n" ); document.write( "--> \n" ); document.write( "----------------- \n" ); document.write( "6. h2(5h+4) Answer: 5h3+4h2 Correct \n" ); document.write( "7. (x+3)2 Answer: x2+9 \n" ); document.write( " \n" ); document.write( "------------- \n" ); document.write( "8. (d-5)2 Answer: d2-25 \n" ); document.write( "Do it like #7 \n" ); document.write( "---------------- \n" ); document.write( "9. (2x2)(x+4)(x-4) Answer: 2x4-16 \n" ); document.write( "No. \n" ); document.write( "= \n" ); document.write( "---------------- \n" ); document.write( "11. To graphically solve the quadratic equation x2+3x-10=5. Answer: Use the quadratic formula, letting a=1, b=3, and c=-15. \n" ); document.write( "12. If the garden box has dimensions x by x feet and an area in square feet equal to the perimeter in feet, what is the value for x that satisfies the requirements? (Hint: The box is square.) Answer: There is not enough information in the problem. \n" ); document.write( "13. Given three consecutive integers with a sum of four times the second number, write an algebraic equation for this situation. Answer: 3n+3=4n \n" ); document.write( "------------------- \n" ); document.write( "14. Factor the trinomial b2-b-6. Answer: (b+3)(b-2) \n" ); document.write( "If you multiply your answer, you'll see the sign of b is wrong. \n" ); document.write( "--------------------- \n" ); document.write( "15. Factor the binomial x2-64. Answer: (x-8)(x+8) Correct \n" ); document.write( "----------------- \n" ); document.write( "16. Factor the binomial 9a2-16. Answer: (3a-4)(3a+4) Correct \n" ); document.write( "----------------- \n" ); document.write( "17. Factor the equation x2=x+20. Answer: (x+5)(x+4) \n" ); document.write( "Equations are solved, not factored ???? \n" ); document.write( "---------------- \n" ); document.write( "18. Solve the equation x2+5x-4=0 using the quadratic formula. Answer: x=.702 and -5.702 \n" ); document.write( "Solve by factoring. \n" ); document.write( " \n" ); document.write( "(x-4)*(x-1) = 0 \n" ); document.write( "x = 1, 4 \n" ); document.write( "---------- \n" ); document.write( "19.Solve the equation 3m2+6m=3 using the quadratic formula. Answer: x=2.5 and -14.5 \n" ); document.write( "3m2+6m=3 \n" ); document.write( " \n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "m = x \n" ); document.write( "-------------- \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "-------------------------------------- \n" ); document.write( "Questions 20-21 write the value of the discriminant of each equation, decide how many different real-number roots the equation has, and determine how many points the parabola will interact with the x-axis. Do not solve the equation. \n" ); document.write( "20. x2+7x+9=0 Answer: Discriminant is 13,indicating there are two real roots, with the parabola intersecting the x-axis at two points. \n" ); document.write( "Correct. \n" ); document.write( "----------------- \n" ); document.write( "21. 2x2+5x+7=0 Answer: Discriminant is -31, indicating there are no real roots, with the parabola not intersecting the x-axis at all. \n" ); document.write( "Correct. \n" ); document.write( " |