Question

1. CALCULE

a) (2x + 3y)² =

b) (3x + 5y)² =
c) (5x – 2y)² =
d) (x – 4y)² =
e) (7x + 5y) . (7x – 6y) =
f) (10x – 8y) . (10x + 8y) =

Answer 1

a) (2x+3y)²

4x²+9y²

b) (3x+5y)²

9x²+25y²

c) (5x-2y)²

25x²-4y²

d) (x-4y)²

x²-16y²

e) (7x +5y).(7x-5y)

7x²-2.(7x.5y)+ 5y²

49x²-14x. -10y+25y²

f) (10x-8y).(10x+8y)

10x²-2.(10x.8y)+ 8y²

100x²-20x. -16y+ 64y²