Question

Wykonaj mnożenie:

a) (a+1)(a-1)

b) (x-15)(x-1)

c) (4+x)(x-8)

d) (3a-2b)(a+b)

Answer 1

^ do kwadratu

 

a) (a+1)(a-1) = a^ - 1

b) (x-15)(x-1) = x^ - 1x - 15x + 15 = x^ - 16x + 15

c) (4+x)(x-8) = 4x - 32 + x^ - 8x = 12x - 32 +x^

d) (3a-2b)(a+b) =3a^ +3ab - 2ab - 2b^ = 3a^ + ab - 2b^

Answer 2

a) a² - 1

b)  x² -16x + 15

c) 4x - 32 + x² - 8x = x² - 4x - 32

d)3a² + 3ab -  2ab - 2b² = 3a² + ab - 2b²