Simplify:
a) 2p3 – 3p2 + 4p -5 -6p3 + 2p2 – 8p -2 + 6p + 8
b) 2x2
– xy + 6x -4y + 5xy - 4x + 6x2 + 3y
c) 5x2
– 2x + 7 – 9 + 7x - 3x2
+ 4x2
– x + 1
Answers
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Step-by-step explanation:
a. 2p^3-3p^2+4p-5-6p^3+2p^2-8p-2+6p+8
=2p^3-6p^3-3p^2+2p^2+4p-8p+6p-5-2+8
= -4p^3-p^2+2p-1.
b. 2x^2-xy+6x-4y+5xy-4x+6x^2+3y
=2x^2+4x^2+5xy-xy+6x-4x-4y+3y.
=6x^2+4xy+2x-y.
c. 5x^2-2x+7-9+7x-3x^2+4x^2-x+1
=5x^2-3x^2+4x^2-2x+7x-x+7-9+1
=6x^2+4x-1.
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