Question

×*(×+4)=60 тендеу ???

Answer 1

$x(x + 4) = 60 \\ x {}^{2} + 4x - 60 = 0 \\ d = 4 {}^{2} - 4 \times 1 \times ( - 60) = 16 + 240 = 256$

$x = \frac{ - 4 + 16 }{2} \\ x = \frac{ - 4 - 16}{2}$

$x = 6 \\ x = - 10$

$x1 = 6 \\ x2 = - 10$