tolongggggg kak makasih gue naikin nih poinnya

1. (√a+√b)(√a-√b) = a-b

2.(2x²+4x)²
(2x²+4x)(2x²+4x)
4x⁴+8x²+8x²+16x²
4x⁴+16x²+16x²
4x⁴+32x²
4x(x³+8x)

3. 1/(x^-2-y^-2)^-2
1 / 1/(x^-2-y^-2)²
1 / 1/(x^-2-y^-2)(x^-2-y^-2)
1 / 1/x⁴-xy²-xy²+y⁴
1 / 1/x⁴-2xy²+y⁴
x⁴-2xy²+y⁴