Question

Add:
a)2x2 - 4x - 5 and 3x2 - 9x - 6
b) 9x3 + 3x2 - 8x - 16 and 5x - 22
c)7x* - 7x3 + 7x2 + 2x and -5x4 + 7x3 + 5x2 - 9​

Answer 1

a)2x^2-4x-5+(3x^2-9x-6)

=5x^2-13x-11

b)9x^3+3x^2-8x-16+(5x-22)

= 9x^3+3x^2-3x-38

c) 7x^4-7x^3+7x^2+2x+(-5x^4+7x^3+5x^2-9)

= 2x^4+12x^2+2x-9