а) x-3x+36x^2=11-(5-6x)×(5+6x)
x-3x+36x^2=11-(25-36x^2)
x-3x+36x^2=11-25+36x^2
x-3x=11-25
-2x=-14
x=7
б) 6x+2+16x^2-9=25x^2-10x
6x-7+16x^2=25x^2-10x
6x-7+16x^2-25x^2+10x=0
16x-7-9x^2=0
-16x+7+9x^2=0
9x^2-16x+7=0
9x^2-7x-9x+7=0
x×(9x-7)-(9x-7)=0
(9x-7)×(x-1)=0
9x-7=0
x-1=0
x=7/9
x=1
x1=7/9 x2=1
в)-x+3=5+2x^2+6x
-x+3-5-2x^2-6x=0
-7x-2-2x^2=0
-2x^2-7x-2=0
2x^2+7x+2=0x= в корне -7+-7^2 (7^2-4x2×2)/2×2
x= в корне -7+-(49-16)/4
а) x-3x+36x^2=11-(5-6x)×(5+6x)
x-3x+36x^2=11-(25-36x^2)
x-3x+36x^2=11-25+36x^2
x-3x=11-25
-2x=-14
x=7
б) 6x+2+16x^2-9=25x^2-10x
6x-7+16x^2=25x^2-10x
6x-7+16x^2-25x^2+10x=0
16x-7-9x^2=0
-16x+7+9x^2=0
9x^2-16x+7=0
9x^2-7x-9x+7=0
x×(9x-7)-(9x-7)=0
(9x-7)×(x-1)=0
9x-7=0
x-1=0
x=7/9
x=1
x1=7/9 x2=1
в)-x+3=5+2x^2+6x
-x+3-5-2x^2-6x=0
-7x-2-2x^2=0
-2x^2-7x-2=0
2x^2+7x+2=0x= в корне -7+-7^2 (7^2-4x2×2)/2×2
x= в корне -7+-(49-16)/4