Question

$(x + 7)(x - 10) + 16$

Answer 1

(x+7)(x-10) +16
x^2-10x+7x-70+16
x^2-3x-54.....

Answer 2

(x + 7)(x - 10) + 16

Let the equation be equal to 0:

(x + 7)(x - 10) + 16 = 0

Open the brackets by multiplying them to get:

x² - 3x - 70 + 16 = 0

Do the additions:

x² - 3x - 54 = 0

Factorise the equation to get:

(x - 9)(x + 6) = 0

x - 9 = 0

x = 9

x + 6 = 0

x = -6

So the values of x are 9 and -6.