Question

Calculeaza valoarea lui m stiind ca: A(m,2) este pe f:R->R, f(x)=xla patrat-5x+7

Answer 1

$\\ f(x)=x^2-5x+7 \\ A(m,2)\in~Parabola. \\ f(m)=2 \\ m^2-5m+7=2 \\ m^2-5m+5=0 \\ Delta=25-20=5 \\ m1= \frac{5+ \sqrt{5} }{2} \\ m2= \frac{5- \sqrt{5} }{2}$