Question

Efetue:
a)(2a-3b)+(-5a+4b)
b)(a^2+3b^2-5ab)+(3a^2-2b^2+5ab)
c)(2x^2-1/2x+1)+(x^2+2x-2/5)
d)(3a^4-a^2+7a-1)-(2a^4+3a^3+5a-6)
Me ajudem por favor!!!

Answer 1

a) 2a -5a -3b+4b = -3a
b) a^2 + 3a^2 + 3b^2 - 2b^2 + 5ab - 5ab = 5a^2 +b^2
c) 2x^2 + x^2 -1/2x + 2x +1-2/5 = 3x^2 +3/2x 3/5
d) 3a^4 -2a^4 - 3a^3 -a^2 +7a-5a -1+6 = a^4 -3a^3-a^2 -2a +5