решите уравнения а) 8х(1+2х)-(4х+3)(4х-3)=2х б)х-3х(1-12х)=11-(5-6х)(6х+5). Created by hihachu. algebra-ru

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

1401Tamara 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

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

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