Question

4x^2-9 factor the expression

Answer 1

> 4x²-9

This expression can be written as

> 4x² ± 0.x - 9

Now , D = b²-4ac

> D = 0 - 4×4×-9

> D = 144

Now , x = -b±√D/2a

> x = 0 ± 12 / 2×4

> x = 12/8 & x = -12/8

So factors are :-

(x-3/2)(x+3/2) = 0