Question

25a²-4（b+c）²怎么进行因式分解？

Answer 1

25a²-4（瞎卜b+c）²=(5a)²-(2b+2c)²
因蠢友为x²-y²=(x+y)(x-y)，磨档穗所以：
=(5a+2b+2c)(5a-2b-2c)

Answer 2

25a²乱野-4（老陪绝b+c）²侍姿
=(5a)2-[2(b+c)]2
=[5a+2(b+c)][5a-2(b+c)]
=(5a+2b+2c)(5a-2b-2c)