Объяснение:
(4х + 6)² = (4х)² + 2*4х*6 + 6² = 16х² + 48х + 36
(3 + 2у)² = 3² + 2*3*2у + (2у)² = 9 + 12у + 4у²
(5а + 3в)² = (5а)² + 2*5а*3в + (3в)² = 25а² + 30ав + 9в²
(10 - 2х)² = 10² - 2*10*2х + (2х)² = 100 - 40х + 4х²
(1 - 3а)² = 1² - 2*1*3а + (3а)² = 1 - 6а + 9а²
(4 - х)(4+ х) = 4*4 + 4*х - х*4 - х*х = 16 + 4х - 4х - х² = 16 - х²
(2х - 5)(2х + 5) = 2х*2х + 2х*5 - 5*2х - 5*5 =
4х² + 10х - 10х - 25 = 4х² - 25
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Объяснение:
(4х + 6)² = (4х)² + 2*4х*6 + 6² = 16х² + 48х + 36
(3 + 2у)² = 3² + 2*3*2у + (2у)² = 9 + 12у + 4у²
(5а + 3в)² = (5а)² + 2*5а*3в + (3в)² = 25а² + 30ав + 9в²
(10 - 2х)² = 10² - 2*10*2х + (2х)² = 100 - 40х + 4х²
(1 - 3а)² = 1² - 2*1*3а + (3а)² = 1 - 6а + 9а²
(4 - х)(4+ х) = 4*4 + 4*х - х*4 - х*х = 16 + 4х - 4х - х² = 16 - х²
(2х - 5)(2х + 5) = 2х*2х + 2х*5 - 5*2х - 5*5 =
4х² + 10х - 10х - 25 = 4х² - 25