Question

Va rog cine stie, urgent!

a) -2,8a+4,2a=...

b) -2,8a³·(-0,3a²b²)=...

c) 24a⁴b÷(-2,4ab)=...

d) (4x+3)²=...

e) (3-5√3)²=...

f) 7x(x-2)+x²-(3-6x)=...

g) 16x²-9y²=...

Answer 1

Răspuns:

a) -2,8a+4,2a= 1,8x

b) -2,8a³·(-0,3a²b²)= 0,84a⁵b²

c) 24a⁴b/(-2,4ab)= -10a³

d) (4x+3)²= 16x²+24x+9

e) (3-5√3)²= 84-30√3

f) 7x(x-2)+x²-(3-6x)= 8x²-8x-3

g) 16x²-9y²= (4x-3y)·(4x+3y)