Question

Efectuati:
a) -2x (3xy - 5y) =
b) (5x + 3)² =
c) (4a -7) (4a +7) =
d) (2x²)³ ×14x² =

Answer 1

a) -2x×3xy-2x×(-5y)= -6x²y+10xy.

b) (5x)²+2×5x×3+3²= 25x²+30x+9.

c) (a)²-7²=16a²-49.

d) 8x la a 6×14x²=112x la a 8.