Đáp án+Giải thích các bước giải:
`2) x²-16=x²-4²`
`=(x-4)(x+4)`
`4) 4y²-x²=(2y)²-x²`
`=(2y-x)(2y+x)`
`6) y²-25x²=y²-(5x)²`
`=(y-5x)(y+5x)`
`8) 64y²-81x²=(8y)²-(9x)²`
`=(8y-9x)(8y+9x)`
`10) (x+3)²-25=(x+3)²-5²`
`=(x+3-5)(x+3+5)`
`=(x-2)(x+8)`
`12) x²-(y+11)²=(x-y-11)(x+y-11)`
`14) 25y²-(x-y)²=(5y)²-(x-y)²`
`=(5y-x+y)(5y+x-y)`
`=(−x+6y)(x+4y)`
`=(x-6y)(x+4y)`
Chúc bn hc tốt🥰
$\text{#LinhSad}$
