Question

х в квадрате плюс 4х минус 32 равно нуль

Answer 1

х²+4х-32=0
х²+8х-4х-32=0 (8х-4х=4х)
х(х+8)-4(х+8)=0
(х+8)(х-4)=0
х+8=0
х-4=0
ответ х=-8,х=4

Answer 2

${x}^{2} + 4x - 32 = 0 \ d = {4}^{2} - 4 times 1 times ( - 32) = 16 + 128 = 144 \ x_{1} = frac{ - 4 - sqrt{144} }{2 times 1} = frac{ - 4 - 12}{2} = frac{ - 16}{2} = - 8 \ x_{2} = frac{ - 4 + sqrt{144} }{2 times 1} = frac{ - 4 + 12}{2} = frac{8}{2} = 4 \ x_{1} = - 8 \ x_{2} = 4$