3.simplify the following: 3
a) ( x+y+z) ( x-y-z)
b) (a+b) (2a -3b+c)- (2a -3b)
Answers
Answered by
1
Answer:
a): {(x) +(y+z)}{(x)-(y+z)}
=(x)^2-(y+z)^2
=x^2-y^2-z^2-2yz
b: (a+b)(2a-3b)+(a+b)c-(2a-3b)
=(2a-3b)(a+b-1)+(a+b)c
=(2a-3b)(a+b)-(2a-3b)+ac+bc
=2a^2-3ab+2ab-3b^2-2a+3b+ac+bc
=2a^2-3b^2-ab+ac+bc-2a+3b
Similar questions