Question

a) x2 - 7x + 10 = 0 a=1_0=21c-10_x=-5x=2​

Answer 1

Resposta:

$x'=5  \\ x"= 2$

Explicação passo-a-passo:

$a)x^2-7x+10=0, \ a=1, \ b=-7, \ c=10\\\Delta=b^2-4*a*c\\\Delta=(-7)^2-4*1*10\\\Delta=49-40\\\Delta=9\\\\x=\frac{-b^+_-\sqrt{\Delta} }{2*a}\\\\ x=\frac{7^+_-3}{2}= x'=5 \ e \ x"= 2$