Question

resolva as subtracoes

A) (3 x²-2y+9) -(5x²-4 y + 10)
B) (7 x²- 8 x + 10) -(10 + 8 x + 7 x²)
C) (5 x+ 6 x - 4 y) - (3 y + 2 x - 7)
D) (4 x³-12 x² + 9x)-(-8x²+2 x³-5 x)

resolva as multiplicacoes

A) 5.(2a+2b)
B)-6x.(-5x+8x²)
C)7y.(y³-4x²+9x)

Answer 1

A) 3x^2-5x^2-2y-4y+9+10=-2x^2-6y+19
B) 7x^2+7x^2-8x+8x+10=14x^2+10
C) 5x+6x-4y-3y+2x-7=11x-7y+2x-7=13x-7y-7
D) 4x^3-2x^3-12x^2+8x^2+9x-5x=2x^3-4x^2+4x

A)10a+10b
B) +30x-48x^2
C) 7y^4-28x^2+9x

espero ter ajudado