Question

PLEASE HELP PLEASE THANK U SO MUCH

Answer 1

Explanation:

x² - 7x - 18 = 0

Product = -18

Sum = -7

Factors = 2 , (-9) {2*(-9) = -18 & 2 +(-9) = -7}

x² + 2x - 9x - 18 = 0

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

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

x + 2 = 0 ; x - 9 = 0

x = -2 ; x = 9

x = -2 , 9

Sale price = 272000

Reduction percentage = 15%

Let the original price = x

Reduction = 15% of x

Original price - reduction price = Sale price

x - 15% of x = £272000

`x -(15)/(100)x = 272000\\\\\\(100)/(100)x-(15)/(100)x=272000\\\\\\(85)/(100)x=272000\\\\\\x=272000*(100)/(85)`

x = 3200 * 100

Original price = £320000