Question

Splitting the middle term of X^2 - 4x -45

Answer 1

Answer:

(x-9)(x-5)

Step-by-step explanation:x²-9x+5x-45

                                           x²+5x-9x-45

                                           x(x+5)-9(x+5)

                                           (x-9)(x-5)

Answer 2

Answer:

$x { }^{2} - 4x - 45$

Step-by-step explanation:

$x { }^{2} - 9x + 5x - 45 = 0$

$x(x - 9) + 5(x - 9) = 0$

$either(x + 5) = 0 \: or(x - 9) = 0$

$x = - 5 \: \: \: or \: x = 9$

$x = - 5 \: rejected$

so x = 9