Question

Решите уравнения а)3х^2+13-10=0 б)2х^2-3х=0 в)16х^2=49 г)х^2-35=0 д)х^2-7х-8=0

Answer 1

A) D=169+120=289 x1= (-13+17)/6=0.3 X2=(-13-17)/6= -5 b) x(2x-3)=0, x1=0, X2=3/2=1.5 v) 16x^2-49=0, (4x-7)(4x+7)=0 4x-7=0, x1=1.75, 4x+7=0 X2= -1.75 г) x^2-2x-35=0 D=4+140=144 x1=(2+12)/2=7, X2=(2-12)/2= -5 д) D=49+32=81, x1=(7+9)/2=8 X2=(7-9)/2= -1