2x(3+8x)-(4x-3)(4x+3)=1,5x
6x+16x²-16x²+9-1,5x=0
4,5x=-9
x=-2
1) (x^2 - 4)(x^2 - 6) = 0 раскрыть скобки х^4 -10х^2 +24 = 0
(x^2 ^- 5)(x^2 - 16) = 0 аналогично х^4 - 21х^2 + 80 = 0
11,22,33,44,55,66,77.88,99,110,121,132,143, и т.д
5x=8
x=8/5
64/5-6y=10
63-30y=50
-30y=-13
y=30/13