Умножение:m(n+k) = mn + mk-s(d-r) = -sd + sr3x2(x-3) = 6x^2 - 18x-5x4(2x-x^3) = -10x^5 + 5x^72a(2a^2-8ab+b^2) = 4a^3 - 16a^2b + 2ab^23y(5-y) - 2y(y+6) = 15y - 3y^2 - 2y^2 - 12y = 13y - 5y^2 - 12y
Решение уравнения:15x - 1 = 3(7x - 1) - 22x + 1 + 3x + 1 = 215x - 1 = 21x - 3 - 22x + 1 + 3x + 1 = 215x - 1 = -x - 215x + x = 1 - 216x = -1x = -1/16
х - 10х + 1 = 4х + 1-9х + 1 = 4х + 1-9х - 4х = 1 - 1-13х = 0x = 0
х - 2 + 2х - 5 + 4х - 1 = 4 - х7x - 8 = 4 - x7x + x = 4 + 88x = 12x = 12/8x = 3/2
Умножение:
m(n+k) = mn + mk
-s(d-r) = -sd + sr
3x2(x-3) = 6x^2 - 18x
-5x4(2x-x^3) = -10x^5 + 5x^7
2a(2a^2-8ab+b^2) = 4a^3 - 16a^2b + 2ab^2
3y(5-y) - 2y(y+6) = 15y - 3y^2 - 2y^2 - 12y = 13y - 5y^2 - 12y
Решение уравнения:
15x - 1 = 3(7x - 1) - 22x + 1 + 3x + 1 = 2
15x - 1 = 21x - 3 - 22x + 1 + 3x + 1 = 2
15x - 1 = -x - 2
15x + x = 1 - 2
16x = -1
x = -1/16
х - 10х + 1 = 4х + 1
-9х + 1 = 4х + 1
-9х - 4х = 1 - 1
-13х = 0
x = 0
х - 2 + 2х - 5 + 4х - 1 = 4 - х
7x - 8 = 4 - x
7x + x = 4 + 8
8x = 12
x = 12/8
x = 3/2