1. (-1,5с+d³)² = (-1,5c)²+2*(-1,5c)*d³+(d³)² = 2,25c²-3cd³+d⁶
2. (15х²+6у)² = (3(5х²+2у))² = 9(5х²+2у)(5х²+3у)
1) 25 - 12 = 13
2) 3721 - 1248 = 2473
-3x • (x - 4) = -3x • x - 3x • (-4) = -3x² + 12x
5x²y • (x² - y) = 5x²yx² - 5x²y • y = 5x⁴y - 5x²y²
(7x - 2) • (x - 5) = 7x² - 35x - 2x + 10 = 7x² - 37x + 10