(x+7)² = х² + 14х + 49
(b+5)² = b² + 10b + 25
(a-2x)² = a² - 4ax + 4x²
(ab-1)² = a²b² - 2ab + 1
(x+7)^2=x^2 + 2*x*7 +7^2 = x^2 + 14x + 49
(b+5)^2=b^2 + 2*b*5 + 5^2= b^2 + 10b + 25
(a-2x)^2=a^2 - 2*a*2x + (2x)^2 = a^2 -4ax + 4x^2
(ab - 1)^2 = (ab)^2 - 2*ab*1 + 1^2 = (ab)^2 - 2ab +1
(x+7)² = х² + 14х + 49
(b+5)² = b² + 10b + 25
(a-2x)² = a² - 4ax + 4x²
(ab-1)² = a²b² - 2ab + 1
(x+7)^2=x^2 + 2*x*7 +7^2 = x^2 + 14x + 49
(b+5)^2=b^2 + 2*b*5 + 5^2= b^2 + 10b + 25
(a-2x)^2=a^2 - 2*a*2x + (2x)^2 = a^2 -4ax + 4x^2
(ab - 1)^2 = (ab)^2 - 2*ab*1 + 1^2 = (ab)^2 - 2ab +1