document.write( "Question 61078: Could you please help?
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document.write( "Solve the following equations. Leave radicals in radical form ( do not calculate their approximate values.)\r
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document.write( "a. \r
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document.write( "b. (the 5's should be at the tip of the radical sign)\r
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document.write( "c. (x+6)^2/5+2=3\r
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document.write( "Thank you for your help!! \n" );
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Algebra.Com's Answer #41998 by uma(370)![]() ![]() ![]() You can put this solution on YOUR website! (a) sqrt(x+6) - 4 = x \n" ); document.write( "Addinfg 4 to either side we get, \n" ); document.write( " sqrt (x+6) - 4 + 4 = x + 4 \n" ); document.write( "==> sqrt(x + 6) = x + 4 \n" ); document.write( "Squaring both the sides we have, \n" ); document.write( " x + 6 = (x + 4)^2 \n" ); document.write( "==> x + 6 = x^2 + 8x + 16 [(a+b)^2 = a^2 + 2ab + b^2] \n" ); document.write( "==> x = x^2 + 8x + 16 - 6 \n" ); document.write( "==> x = x^2 + 8x + 10 \n" ); document.write( "==> 0 = x^2 + 8x + 10 - x [adding -x to both the sides] \n" ); document.write( "==> 0 = x^2 + 7x + 10 \n" ); document.write( "==> 0 = x^2 + 5x + 2x + 10 [Splitting the middle term] \n" ); document.write( "==> 0 = x(x+5) + 2(x+5) [Taking out the common factor] \n" ); document.write( "==> 0 = (x+5)(x+2) \n" ); document.write( "==> x + 5 = 0 or x+2 = 0 \n" ); document.write( "==> x = -5 or x = -2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(b) (5)sqrt(3x+1)=(5)sqrt(x^2-2x-5) \n" ); document.write( "Dividing both the sides by 5 we get, \n" ); document.write( " sqrt(3x+1)= sqrt(x^2-2x-5) \n" ); document.write( "Squaring both the sides, \n" ); document.write( "3x + 1 = x^2 - 2x - 5 \n" ); document.write( "==> 3x + 1 - 3x = x^2 - 2x - 5 - 3x [ adding - 3x to both the sides] \n" ); document.write( "==> 1 = x^2 - 5x - 5 \n" ); document.write( "==> 0 = x^2 - 5x - 5 - 1 [adding -1 to both the sides] \n" ); document.write( "==> 0 = x^2 - 5x - 6 \n" ); document.write( "==> 0 = x^2 - 6x + x - 6 \n" ); document.write( "==> 0 = x(x-6) + 1(x-6) \n" ); document.write( "==> 0 = (x-6)(x+1) \n" ); document.write( "==> x - 6 = 0 or x + 1 = 0 \n" ); document.write( "==> x = 6 or x = -1\r \n" ); document.write( "\n" ); document.write( "(c)[(x+6)^2]/5 + 2 = 3 \n" ); document.write( "==> (x+6)^2 /5 = 3-2 [Adding -2 to both the sides] \n" ); document.write( "==> (x+6)^2/5 = 1 \n" ); document.write( "Multiplying both the sides by 5 we have, \n" ); document.write( "(x+6)^2 = 1*5 \n" ); document.write( "==> (x+6)^2 = 5 \n" ); document.write( "==> x^2 + 12x + 36 = 5 \n" ); document.write( "==> x^2 + 12x + 36 - 5 = 0 [add -5 to both the sides] \n" ); document.write( "==> x^2 + 12x + 31 = 0 \n" ); document.write( "This equation does not have exact values for x. \n" ); document.write( "Please check the equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Good Luck!!! \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |