Question

descompuneți în factori
x²-100
36-25x²
49-4x²
64-25x²
81-49x²​

Answer 1

x²-100=x²-10²=(x+10)(x-10)

36-25x²=6²-(5x)²=(6+5x)(6-5x)

49-4x²=7²-(2x)²=(7+2x)(7-2x)

64-25x²=8²-(5x)²=(8+5x)(8-5x)

81-49x²=9²-(7x)²=(9+7x)(9-7x)