Question

(2x²-9x+2)+(3x²+7x-1)=​

Answer 1

Resposta:

${2x}^{2} - 9x + 2 + (3 {x}^{2} + 7x - 1) \\ {2x}^{2} - 9x + 2 + 3 {x}^{2} + 7x - 1 \\2 {x}^{2} + 3 {x}^{2} = 5 {x}^{2} \\ - 9x + 7x = - 2x \\ + 2 - 1 = - 1 \\ 5 {x}^{2} - 2x - 1 = 0$