Question

do 10 number all bit

Answer 1

10.1)(x+y)²=x²+2xy+y²
[2+(-3)]²=(2)²+2×2×(-3)+(-3)²
(-1)²=4+(-12)+9
1=13-12
1=1
2)(x-y) ²=(x)²-2xy+(y)²
[2-(-3)]²=(2)²-2×2×(-3)+(-3)²
(5)²=4+12+9
25=25
3) (x-+y²=(x+y)(x-y)
2²-(-3)²=[2+(-3)][2-(-3)]
4-9=(-1)(5)
-5=-5
4) (x+y)²=(x-y)²+4xy
[ (2)+(-3)]²=[2-(-3)]²+4×2×(-3)
(-1)²=(5)²+(-24)
1=25-24
1=1
5) (x+y)³=x³+y³+3x²y+3xy²
[2+(-3)]³=(2)³+(-3)³+3×(2)²×(-3)+3×2×(-3)²
(-1)³=8+(-27)+-36+54
-1=62-63
-1=-1