Hi!
Answers of 5;
(a)
(3a - 2)² = 9a² - 12a + 4
(3a - 2)² = (3a - 2)(3a - 2) = 9a² - 12a + 4
The formula for this is;
(x - y)² = x² - 2xy + y²
(b)
(5 + 2p)² = 25 + 20p + 4p²
(5 + 2p)² = (5 + 2p)(5 + 2p) = 25 + 20p + 4p²
The formula for this is;
(x + y)² = x² + 2xy + y²
(c)
(8 - 5m)² = 64 - 80m + 25m²
(8 - 5m)² = (8 - 5m)(8 - 5m) = 64 - 80m + 25m²
The formula for this is;
(x - y)² = x² - 2xy + y²
Answers of 6;
(a)
(y + 7)(y - 7) = y² - 7² = y² - 49
The formula for this is;
x² - y² = (x + y)(x - y)
(b)
(2x - 3)(2x + 3) = (2x)² - 3² = 4x² - 9
The formula for this is;
x² - y² = (x + y)(x - y)
(c)
(4m - 5)(4m + 5) = (4m)² - 5² = 16m² - 25
The formula for this is;
x² - y² = (x + y)(x - y)
==> Sorry, my English is bad, I'm trying to learn this language.
Wish Good Lessons! ^-^
