Question

X^2 + 7x – 18 = 0

a
{–2, 9}
b
{–9, 2}
c
{2, 9}
d
{–2, –9}

Answer 1

b)-9,2

Explanation:

x^2+7x-18=0

x^2+9x-2x-18=0

x(x+9)-2(x+9)=0

(x+9)(x-2)=0

therefore

x=-9

x=2