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Егорычь1
@Егорычь1
March 2022
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СРОЧНО ВСЕ
ПЖРЖПЖПЖПЖЖППЖППЖЖПЖП
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mikael2
Verified answer
(2a-1)²=4a²-4a+1 (x+3y)²=x²+6xy+9y² (7-x)(7+x)=49-x²
2. (x+5)²-5x(2-x)=x²+10x+25-10x-5x²=25-4x²=(5-2x)(5+2x)
16y+2(y-4)²=16y+2y²-16y+32=2y²+32
3. 81-a²=(9-a)(9+a) 5x²-5y²=5(x-y)(x+y) 3x²-6xy+3y²=3(x²-2xy+y²)=3(x-y)²
4. (a²+4a)²-a²(a²-4)-4a²(2a-1)=a⁴+8a³+16a²-a⁴+4a²-8a³+4a²=
=24a²b-a
5.(x-2)²-16=(x-2-4)(x-2+4)=(x-6)(x+2)
a³+(y/2)³=(a+y/2)(a²-ay/2+y²/4)
81y⁴-x⁴=(9y²)²-(x²)²=(9y²+x²)(9y²-x²)
a-a²+b+b² = (a+b)+b²-a²=(a+b)+(b+a)(b-a)=(a+b)(1+b-a)
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Answers & Comments
Verified answer
(2a-1)²=4a²-4a+1 (x+3y)²=x²+6xy+9y² (7-x)(7+x)=49-x²2. (x+5)²-5x(2-x)=x²+10x+25-10x-5x²=25-4x²=(5-2x)(5+2x)
16y+2(y-4)²=16y+2y²-16y+32=2y²+32
3. 81-a²=(9-a)(9+a) 5x²-5y²=5(x-y)(x+y) 3x²-6xy+3y²=3(x²-2xy+y²)=3(x-y)²
4. (a²+4a)²-a²(a²-4)-4a²(2a-1)=a⁴+8a³+16a²-a⁴+4a²-8a³+4a²=
=24a²b-a
5.(x-2)²-16=(x-2-4)(x-2+4)=(x-6)(x+2)
a³+(y/2)³=(a+y/2)(a²-ay/2+y²/4)
81y⁴-x⁴=(9y²)²-(x²)²=(9y²+x²)(9y²-x²)
a-a²+b+b² = (a+b)+b²-a²=(a+b)+(b+a)(b-a)=(a+b)(1+b-a)