a) 8x^2-8y^2 = 8x2−y2x^2-y^2x2−y2 = 8x+yx+yx+yx−yx-yx−y
b) -a^2+6a-9 = -a2−6a+9a^2-6a+9a2−6a+9 = -a−3a-3a−3a−3a-3a−3 = -a−3a-3a−3^2 c) ab^3-ba^3 = ab^3 - ab^3 = 0
Решение уравнения xx−2x-2x−2x+1x+1x+1=x^2x−1x-1x−1: xx2−2x+x−2x^2 - 2x + x - 2x2−2x+x−2 = x^3 - x^2 x*x2−x−2x^2 - x - 2x2−x−2 = x^3 - x^2 x^3 - x^2 - x^2 + x = x^3 - x^2 x^3 - 2x^2 + x = x^3 - x^2 -x^2 + x = -x^2 x = 0
Представление в виде произведения: a) 3x-3y+x^2y-xy^2 = 3x−yx-yx−y + xyx−yx-yx−y = 3+xy3+xy3+xyx−yx-yx−y
б) a^3-8 = a2a^2a2^2 - 2^2 = a2−2a^2-2a2−2a2+2a^2+2a2+2
a) c−2c-2c−2c+3c+3c+3-c^2 = c^2 + 3c - 2c - 6 - c^2 = c
b) 7x+8x+8x+8+x+8x+8x+8x−8x-8x−8 = 7x + 56 + x^2 - 64 = x^2 + 7x - 8
c) x+5x+5x+54x-2x+52x+52x+5^2 = 4x^2 + 20x - 4x2+20x+254x^2 + 20x + 254x2+20x+25 = 4x^2 + 20x - 4x^2 - 20x - 25 = -25
a) 8x^2-8y^2 = 8x2−y2x^2-y^2x2−y2 = 8x+yx+yx+yx−yx-yx−y b) -a^2+6a-9 = -a2−6a+9a^2-6a+9a2−6a+9 = -a−3a-3a−3a−3a-3a−3 = -a−3a-3a−3^2
c) ab^3-ba^3 = ab^3 - ab^3 = 0
Решение уравнения xx−2x-2x−2x+1x+1x+1=x^2x−1x-1x−1:
xx2−2x+x−2x^2 - 2x + x - 2x2−2x+x−2 = x^3 - x^2
x*x2−x−2x^2 - x - 2x2−x−2 = x^3 - x^2
x^3 - x^2 - x^2 + x = x^3 - x^2
x^3 - 2x^2 + x = x^3 - x^2
-x^2 + x = -x^2
x = 0
Представление в виде произведения:
a) 3x-3y+x^2y-xy^2 = 3x−yx-yx−y + xyx−yx-yx−y = 3+xy3+xy3+xyx−yx-yx−y б) a^3-8 = a2a^2a2^2 - 2^2 = a2−2a^2-2a2−2a2+2a^2+2a2+2