Question

Wykonaj mnożenie:
a) (a+1)*(a-1)=

b)(x-15)*(x-1)=

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

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

e)2(b-3c)*(b+3c)=

f)=

Answer 1

a) (a+1)*(a-1)=a²-1

b)(x-15)*(x-1)=x²-x-15x+15=x²-16x+15

c)(4+x)*(x-8)=4x-32+x²-8x=x²-4x-32

d)(3a-2b)*(a+b)=3a²+3ab-2ab-2b²=3a²-2b²+ab

e)2(b-3c)*(b+3c)=2(b²+3bc-3bc-9c²)=2(b²-9c²)=2b²-18c²