Question

Daca:ab+ac=52 si b+c=-13,calculati a...Putin ajutor?...

Answer 1

$ab+ac=52 \\ a(b+c)=52 \\ b+c=-13 \\ -13a=52=\ \textgreater \ a=-4$

Answer 2

$\displaystyle ab+ac=52 \\ b+c=-13 \\ a=? \\ ab+ac=52 \\ a(b+c)=52 \\ -13a=52 \\ a=- \frac{52}{13} \\ a=-4$