Question

Помогите пожалуйста дам 60 баллов

Answer 1

$1)y=x^{2} -8x+13\\\\X_{v}=-\frac{-8}{2}=4\\\\Y_{v}=4^{2}-8*4+13=16-32+13=-3\\\\\boxed{(4 \ ; \ -3)}\\\\\\3)y=-2x^{2}+4x-5\\\\X_{v}=-\frac{4}{-4}=1\\\\Y_{v}=-2*1^{2}+4*1-5=-2+4-5=-3\\\\\boxed{(1 \ ; \ -3)}\\\\\\4)y=-3x^{2} +12x+7\\\\X_{v}=-\frac{12}{-6} =2\\\\Y_{v}=-3*2^{2}+12*2+7=-12+24+7=19\\\\\boxed{(2 \ ; \ 19)}$