Question

e) x (x + 11)+2(x+21)=​

Answer 1

Resposta:

Explicação passo-a-passo:

x²+11x+2x+42=0

x²+13x+42=0

Δ=b²-4ac

Δ=13²-4*1*42

Δ=169-168

Δ=1

x=-13+-1/2

x'= -14/2

x'=-7

x"=-12/2

x"=-6