1)m²+m-90=0 2)3t²+7t+4=0 Прошу помочь
1)2m^2=90 m2 = 45
x1 = + √ 45 = + 3√ 5
x2 = – √ 45 = – 3√ 5
2)Вычислим дискриминант D
D = b2 - 4ac = ( + 7)2 – 4·3·( + 4) = 1
t1 = -b + √ D = -7 + √ 1 = -7 + 1 = -6 = -1 = –1
2a 2·3 6 6 1
t2 = -b – √ D = -7 – √ 1 = -7 – 1 = -8 = –4
2a 2·3 6 6 3