Question

Решите неравенство X^2<-2x+63

Answer 1

решение на фотографии

Answer 2

${x}^{2} < - 2x + 63 \ {x}^{2} + 2x - 63 < 0 \ {x}^{2} + 9x - 7x - 63 < 0 \ x(x + 9) - 7(x + 9) < 0 \ x + 9 < 0 \ x - 7 > 0 \ \ x + 9 > 0 \ x - 7 < 0 \ \ x < - 9 \ x > 7 \ x > - 9 \ x < 7$