Question

Ax+ay+b(x+y)
xz+yz-2xt-2yt
ax²-ay²-bx²-cx²+by²+cy²
a⁴-a³+a-1
x²-y²+yz+xy+xz-xy
(a+b+c)³-a³-b³-a³
разложение на множители

Answer 1

ax + ay + b(x+y) = a(x + y) + b(x + y) = (a + b)(x + y)

xz + yz - 2xt - 2yt = z(x + y) - 2t(x + y) = (z - 2t)(x + y)

ax² - ay² - bx² - cx² + by² + cy² = a(x² - y²) - b(x² - y²) - c(x² - y²) = (a - b - c)(x² - y²) = (a - b - c)(x - y)(x + y)

a⁴ - a³ + a - 1 = a³(a - 1) + 1(a - 1) = (a³ - 1)(a - 1) = (a - 1)(a - 1)(a² + a + 1)

x² - y² + yz + xy + xz - xy = (x - y)(x + y) + y(z + x) + x(z - y) = (x + y)(x - y + z)

(a+b+c)³-a³ - b³ - c³ = 3a²b + 3a²c + 3ab² + 6abc + 3ac² + 3b²c + 3bc² = 3(a + b)(a + c)(b + c)