Question

$(5x {}^{2} - 2x + 13) - (2 {x}^{2} + 11 - 20)$
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Answer 1

Resposta:

$(5x^{2} -2x+13)-(2x^{2} +11-20)=3x^{2} -2x+22$

Explicação passo-a-passo:

$(5x^{2} -2x+13)-(2x^{2} +11-20)=5x^{2} -2x+13-(2x^{2}-9)=5x^{2} -2x+13-2x^{2}+9=3x^{2} -2x+22$