Question

If x*x-2x-35=0 then x=?

A. -35

B. 2x^3

C. -5

D. 7

Answer 1

X^2 - 2X - 35=0

X=

-b+- √ b^2 - 4ac
_____________
2a

2+- √ 4+140
__________
2

2+- √ 144
________
2

Either,
2+12/2
=14/2=7

Or,
2-12/2
=-5

Hope it helps

Answer 2

x^2 -2x-35= 0
x2 - (7x-5x) -35=0
x2 -7x +5x -35=0
x (x -7) +5(x -7)=0
(x +5)(x -7)=0
x= 7 or -5

so option C n D both r ryt.......
bcoz answer can b 7 or -5 both as its a qudratic equation n has two zeroes