Question

(5X-3)(-5X-3)-(5X+3)²+(5x-3)²=? √(-2)²+|1-√2|-3√2=?

在线等哦 ~~~
亲们帮帮忙啦,给分采纳的速度咯 ~~

Answer 1

(5X-3)(-5X-3)-(5X+3)²+(5x-3)²
= -(5X-3)(5X+3)+(5x-3)²-(5X+3)²
= -(25x²-9)+(25x²-9)²
=(25x²-9)²-(25x²-9)
=(25x²-9)[(25x²-9)-1]
=(25x²-9)(25x²-10)

√(-2)²+|1-√2|-3√2
=√4 + 1-√2-3√2 或 =√4 + 1-√2-3√2
=2+1-4√2 =-2+1-4√2
=3-4√2 = -1-4√2

Answer 2

1) (5X-3)(-5X-3)-(5X+3)²+(5x-3)²
=-(25x²-9)+(5x-3+5x+3)(5x-3-5x-3)
=-(25x²-9)-60x=-(25x²+60x-9)
2) √(-2)²+|1-√2|-3√2==√4 - 1+√2-3√2
=2-1-2√2=1-√2