Find the value of the following expression, when x =-1 : b) -x+2
Answers
Answer:
Put the value of the X in the given expression.
-(-1) + 2 = 3
Step-by-step explanation:
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Secondary School Math 5 points
Find out the value of a,b,c which will make each of expression x^4+ax^3+bx^2+cx+1 and x^4+2ax^3+2bx^2+2cx+1 a perfect square
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Answer with explanation:
The meaning of perfect square for a polynomial can be written as ,if a polynomial having one variable can be expressed as
(ax^n+b)^2
We have to find the value of ,a,b,and c such that ,x^4+ax^3+bx^2+cx+1 {\text{and}} x^4+2ax^3+2bx^2+2cx+1 becomes a perfect square.
1.x^4+ax^3+bx^2+cx+1
put,a=0,b=2,c=0
The above equation becomes
x^4+2x^2+1=x^2+2\times x^2+1=(x^2+1)^2
2.x^4+2ax^3+2bx^2+2cx+1
Put,a=0,b=1,c=0
The above equation becomes
x^4+2x^2+1\\\\=(x^2)^2+2\times x^2+1^2\\\\=(x^2+1)^2
Used the following Identity
(a+b)^2=a^2+b^2+2ab
For, Polynomial 1, →a=0,b=2,c=0
For,Polynomial ,2,→a=0,b=1,c=0