Question

Calcule o valor numérico das expressões:
A) a³-3 a+6(para a=2)
B) 2x²+2xy+3(para x=-3 e y=4)
C) x²+5x(para x=1/2)

Answer 1

A) 2³-3 2+6
=16-3+8
=13-8
=5
B) 2.(-3)²+2.(-3).4+3
=2.9+(-6).7
=18-6.7
=18-42
=-24
C) 1/2²+5.1/2
=0.25+2.55
=2.8