Решите уравнения а) 8х(1+2х)-(4х+3)(4х-3)=2х б)х-3х(1-12х)=11-(5-6х)(6х+5)

Question

Решите уравнения

а) 8х(1+2х)-(4х+3)(4х-3)=2х

б)х-3х(1-12х)=11-(5-6х)(6х+5)

Answer 1

А) 8х(1+2х)-(4х+3)(4х-3)=2х
8x + 16x^2 - (16x^2-9) = 2x
8x + 16x^2 -16x^2 -2x = -9
6x=-9
x=-9/6=-3/2=-1,5

б)х-3х(1-12х)=11-(5-6х)(6х+5)
   x-3x + 36x^2 = 11 -(25 - 36x^2)
x - 3x + 36x^2 - 36x^2 = 11 - 25
-2x = -14
x=7

Answer 2

А) 8х(1+2х)-(4х+3)(4х-3)=2х. 8х+16х²-16х²+12х-12х+9=2х. 6х=-9 х=-1,5 б) х-3х(1-12х)=11-(5-6х)(6х+5) х-3х+36х²=11-30х-25+36х²+30х. -2х= -14. х=7