Question

A=3x²+2x-1 B=x²+3x+1 calcula a+b
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Answer 1

Explicación paso a paso:

$(3 {x}^{2} + 2x - 1) + ( {x}^{2} + 3x + 1) = 0\\ 3 {x}^{2} + {x}^{2} + 2x + 3x - 1 + 1 = 0 \\ 4 {x}^{2} + 5x + 0 = 0\\ 4 {x}^{2} + 5x = 0 \\ x(4x + 5) = 0 \\ x1 = 0 \\ x2 = 4x + 5 = 0 \\ x2 = 4x = - 5 \\ x2 = - \frac{5}{4}$