Question

factories using middle team split -x²+3x+18​

Answer 1

Step-by-step explanation:

Given: x2−3x−18

            =x2−6x+3x−18, (split the middle term)

            =(x2−6x)+(3x−18),     (group the pair of terms)

            =x(x−6)+3(x−6),          (factor each binomials)

            =(x−6)(x+3),             (factor out common factor (x−6))

Answer 2

Answer:

$= > - x {}^{2} + 3x + 18 = 0\\ \: \: = > - x {}^{2} + 6x - 3x + 18 = 0\\ = > - x(x - 6) - 3(x - 6) = 0 \\ = > ( - x - 3)(x - 6) = 0 \\ = > - x - 3 = 0 \: \: or \: \: x - 6 = 0 \\ = > - x = 3 \: \: or \: x = 6 \\ = > x = - 3 \: \: or \: 6$