Question

please answer me it's urgent​

Answer 1

Step-by-step explanation:

1) ax*4+bx³+cx²+dx+e

x²-1=0

x=±1

a(1)*4+b(1)³+c(1)²+d(1)+e

1+1+1-1+1

3-2=1

2) a³+b³+c³-3abc

(a+b+c)(a²+b²+c²-ab-bc-ca)

(15)(83-3(5)(5)(5)

solve this u get urs answer

3) 1+2x=x²

x²-2x+1=0

x²-x-x+1=0

x=1