Question

4x²+12x-72 Factor the expression completely.

Answer 1

4(x^2 + 3x - 18 )

x^2 + 6x - 3x - 18 = 0

(x+6)(x-3) = 0

x = -6 , 3

Answer 2

✔✔ 4 X ^ 2 + 12 x - 72

= Devide by 4 to the hole eqn

Now , x ^ 2 + 3 x - 18 = 0

x ^ 2 + 6 x - 3 x - 18 = 0

= x ( x + 6 ) - 3 ( x + 6 )

= ( x + 6 ) ( x - 3 )

↪ = x = -6. or. x = 3. ⚫