find the value of the following expressions, if g = 2 and h= - 3
i) 3g+2h-4
ii) g2+h2-h
iii) 4g+h ------- 5
(iii) miltiply out (x + 7)(x-2)
thx.:)
(x + 7)(x - 2)
Use FOIL -- First, Outside, Inside, Last
First = x · x Outside = x · -2 Inside = 7 · x Last = 7 · -2
(x + 7)(x - 2) = (x)(x) + (x)(-2) + (7)(x) + (7)(-2)
= x² - 2x + 7x - 14
= x² + 5x - 14
