Multiply.
(i) 1-x+y by 1+x+y
(ii) 2x-3y+5z by x + 2y-z
Please tell explain step by step....
Answers
Answered by
2
Answer:
(1-x+y)(1+x+y)
1+x+y-x-x²-xy+y+xy+y²
1+2y-x²+y²
(2x-3y+5z)(x+2y-z)
2x²+4xy-2xz-3xy-6y²+3zy+5xz+10zy-5z²
2x²+xy+3xz-6y²+13zy-5z²
Answered by
6
Answer:
=> (1-x+y)(1+x+y)
=> (1)² - (x + y)²
=> 1 - (x² + y² + 2xy)
=> 1 - x² -y² -2xy .
=> (2x-3y+5z)(x+2y-z)
=> 2x²+4xy-2xz-3xy-6y²+3zy+5xz+10zy-5z²
=> 2x² - 6y² -5z² + xy +3xz +13zy.
Step-by-step explanation:
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