Ответ:
Объяснение:
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a⁴ + 4a³ + a² = a²(a² + 4a + 1)
3a + 20xb -3b - 20xa = (3a - 3b) + (20xb - 20xa) = 3(a - b) + 20x(b - a) =
= 3(a - b) - 20x(a - b) 0 8a - b)(3 - 20x)
x² - y² - 5x - 5y = (x² - y²) - (5x + 5y) = (x + y)(x - y) - 5(x + y) = (x + y)(x - y - 5)
A / B = 3
A = 3B
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1) A + 9B + 38 = 3B + 9B + 38 = 12B + 38 = 2 * ( 6B + 19 )
2) A + 3B + 19 = 3B + 3B + 19 = 6B + 19
3) [ 2 * ( 6B + 19 ) ] / ( 6B + 19 ) = 2
ОТВЕТ 2
Х+2=0 и 2х-3=0.
x=-2. 2x=3 ,
х= 3/2,
х=1,5
ответ х1=-2, х2=1,5
15a^3-3a^2b= 3a^2(5a-b)