Question

помогите решить, пожалуйста!!!

Answer 1

3(1+2xy)(1-2xy)= 3(1-4x²y²)= 3-12x²y²

(x²-y³)²=(x²)²-2x²y³+(y³)²= x^4  - 2x²y³= y^6

(a+b)²- (a-b)²=4ab

(4x-3)(4x+3)-(4x-1)²=3x

16x²-9-(16x²-8x+1)=3x

16x²-9-16x²+8x-1=3x

-10+8x=3x

8x-3x=10

5x=10

x=2

16c²-49=0

16c²=49

c²=49/16( дробь)

с= ± 7/4( дробь)