Question

Calcule
a)9x-(5-x)
b)7x+(2x²+x+5)
c)9x²+5-(2x+x+5)
d)5x²+x~5(x elevado a 5) -2x³+4x-7

Answer 1

a)
= 9x - (5 - x)
= 9x - 5 + x
= 10x - 5

b)
= 7x + (2x² + x + 5)
= 7x + 2x² + x + 5
= 2x² + 7x + x + 5
= 2x² + 8x + 5

c)
= 9x² + 5 - (2x + x + 5)
= 9x² + 5 - (3x + 5)
= 9x² + 5 - 3x - 5
= 9x² - 3x


d)
5x² + x~5(x elevado a 5) -2x³+4x-7

= 5x² + x⁵ - 2x³ + 4x - 7

= x⁵ - 2x³ + 5x² + 4x - 7