SOLUTION: SOLVE 4x^2 -3x-7=0

Question 1096075: SOLVE
4x^2 -3x-7=0
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
4x^2 -3x-7 = 0
:
factor the polynomial
:
(4x-7) * (x+1) = 0
:
1) 4x - 7 = 0
:
4x = 7
:
x = 7/4
:
2) x +1 = 0
:
x = -1
:
*****************************************
x = 7/4 and x = -1
:
check our answers
:
1) x = 7/4
:
4*(7/4)^2 -3*(7/4) -7 = 0
:
4*49/16 -21/4 -7 = 0
:
196/16 -84/16 -7 = 0
:
112/16 -7 = 0
:
7 - 7 = 0
:
0 = 0
:
2) 4*(-1)^2 -3*(-1) -7 = 0
:
4 +3 -7 = 0
:
7 - 7 = 0
:
0 = 0
:
our answers check :-)
******************************************
:
RELATED QUESTIONS
solve... (answered by nerdybill)

4x^2 - 3x -7... (answered by ewatrrr)

Solve... (answered by jim_thompson5910)

3x^2-4x-7=0 solve quadratic formula to solve the... (answered by lynnlo)

solve quadratic formula to solve the equation with steps... (answered by ewatrrr)

solve the quadratic equation 3x squared +4x+2=0 {{{3x^2 + 4x + 2 =... (answered by rapaljer)

Use the quadratic formula to solve the equation. 3x^2 - 4x - 7 =... (answered by jim_thompson5910)

please help me solve this 3x^2-4x+7 when... (answered by rfer)