Question

Answrs needed in full explanation​

Answer 1

REQUIRED SOLUTION:

ANSWERS:

• -x²-y²-1
• a=0

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SOLUTION 1:

Here in this question we have to add all the three equations. We can add similar terms to simplify this question.

Let's start!

=> (x²-y²-1)+(y²-1-x²)+(1-x²-y²)

Now remove the brackets.

=> x²-y²-1+y²-1-x²+1-x²-y²

Now we have to arrange similar terms.

=> x²-x²-x²-y²+y²-y²-1-1+1

Now we can subtract similar terms.

=> -x²-y²-1

Hence the final answer is -x²-y²-1.

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SOLUTION 2:

Here in this question we have given a quadratic equation and value of x is given to be 0 and we have to find the value of a.

Let's start!

=> p(x)=2x²+x-a

Now put the value of x to be 0 in this equation.

=> p(0)=2(0)²+(0)-a

We know that whenever a number is multiplied by 0, it will give answer to be 0.

=> 0=-a

[∴ Hence a=0]