Question

Efetue as operação

a) (3a²+my) + (2a²+2my)
b) (7x²+3y) + (2x²-y)-(x²+2y)
c) (2am-y³) - (am-y³)+(7am+5y³)
d) (x³+x²-1) + (x²-2x+7) - (x³-2x²+8)
e) (7y²+y-3) - (2y³-y²+6y-2) + (2y-1)

Answer 1

a) (3a²+my) + (2a²+2my) = 3a²+my+ 2a²+2my==> 5a² + 3my
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b) (7x²+3y) + (2x²-y)-(x²+2y) = 7x² + 3y + 2x² -y - x² - 2y =  8x² 
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c) (2am-y³) - (am-y³)+(7am+5y³) = 2am-y³-am+y³+7am+5y³ = 8am + 5y³
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d) (x³+x²-1) + (x²-2x+7) - (x³-2x²+8) = x³+x²-1+x²-2x+7-x³+2x²-8) = 4x²-2
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e) (7y²+y-3) - (2y³-y²+6y-2) + (2y-1) = 7y²+y-3 - 2y³+y²-6y+2 +2y-1

 - 2y³ + 8y² - 3y -2