Question

plz help me plz i need all answer of those question​

Answer 1

6.

a²x²-3abx+2b²=0

(ax)²-2.ax.b+b²+b²-abx=0

(ax-b)²=abx-b²

(ax-b)²=b(ax-b)

ax-b=b

ax=2b

x=2b/a

7.

9x²-6b²x-(a⁴-b⁴)=0

(3x)²-2.3x.b²+(b²)²-a⁴=0

(3x-b)²=a⁴

(3x-b)=a²

3x=a²+b

x=(a²+b)/3

8.

4x²+4bx-(a²-b²)=0

(2x)²+2.2x.b+b²-a²=0

(2x+b)²=a²

2x+b=a

2x=a-b

x=(a-b)/2