Question

determina pe n din egalitatea: n×n-5×2=3×5

Answer 1

n×n-5×2=3×5
n×n-10=15
n×n=15+10
n×n=25
n=5

Answer 2

n*n-5*2=3*5
$n^{2}$=15+10
$n^{2}$=25
n= \sqrt{25}
n=5