Question

Zad.3
Zapisz w postaci sumy.
a) (x-5)²
b) (4y + 1)²
c) (5z - 3t)²
d) (5a - 7b) (5a + 7b)

Answer 1

A) (x-5)²=x²-5²=x²-25
b) (4y + 1)²=16y²+1
c) (5z - 3t)²=25z²-9t²
d) (5a - 7b) (5a + 7b)=25a²-49b²

Answer 2

A) (x-5)²=x²-10x-25
b) (4y + 1)²=16y²+8y-1
c) (5z - 3t)²=25z²-30zt-9t²
d) (5a - 7b) (5a + 7b)=5a²-7b²