find the roots of the equation 5x²-7x-6=0 by the method of completing square method
Answers
Answer:
5x2 -7x -6 =0
5x2 -10x +3x -6 =0
5x( x-2) +3(x-2) =0
(x-2) (5x+3)=0
x=2 , x=-3/5
direct method
5x2 -7x -6 =0
+10/5 -3/5
2 ,-3/5
Answer:
Step-by-step explanation:
5x² - 7x - 6 = 0 workings
÷ by 5 on both sides (1/2 x coefficient of x )²
x² - 7x/5 - 6/5 = ( 1/2 x -7/5)²
x² - 7x /5 + 49/100 = 6/5 +49/100 = ( - 7/10)²
( x - 7/10)² = 169/100 = 49/100
take √ on both sides
x - 7/10 = ± 13/10
x -7/10 = 13/10 (or) x - 7/10 = - 13/10
x = 13/10 + 7/10 x = -13/10 + 7/10
= 20/10 = -6/10
= 2 = -2/5