Question

Zapisz w postaci sumy algebraicznej
a) (x+y)(x-y) b
b) (t-7)(t+7)
c) (2p+3)(2p-3)
d) (5m-n)(5m+n)
e) (w+4u)(w-4u)
f) (6a-5b)(6a+5b)

Answer 1

a) (x+y)(x-y) =x² - y²

b) (t-7)(t+7) = t² - 49

c) (2p+3)(2p-3) = 4p² - 9

d) (5m-n)(5m+n) = 25m² - n²

e) (w+4u)(w-4u) = w² - 16u²

f) (6a-5b)(6a+5b) = 36a² - 25b²