Question

Resolva as expressões algResolva as expressões algébricas:
a) (3x^4 – 2x² +x – 1) + (x^4 – x³ + 5x – 12)
b) (5x – 3x²) + (4 – 5x) – (6x² – 4x – 5) + (4 – 4x)
c) (4x – 8)(2 – 3x + 4x²)
d) (2x –3y). 4xy

Answer 1

a)                                                                    

3x⁴-2x²+x-1+(x⁴-x³+5x-12)

3x⁴-2x²+x-1+x⁴-x³+5x-12

4x⁴-2x²+x-1-x³+5x-12

4x⁴-2x²+6x-1-x³-12

4x⁴-2x²+6x-13-x³

4x⁴-x³-2x²+6x-13

b)

5x-3x²+4-5x-6x²+4x+5+4-4x

-9x²+13

c) 4x(2-3x+4x²) - 8(2-3x+4x²)

8x-12x²+16x³-16+24x-32x²

32x-44x²+16x³-16

16x³-44x²+32x-16

d) 8x²y-12xy²