Question

What must be subtracted from -3x²+2x+8 to get
-x²+6x+7

Answer 1

Concept Introduction:-

Objects in a collection are removed by subtraction, an arithmetic operation.

Given Information:-

We have been given that the number $-3x^2+2x+8$ to get

$-x^{2}+6x+7$

To Find:-

We have to find that what must be substracted.

Solution:-

According to the problem

Therefore

$-3x^2+2x+8-(-x^2+6x+7)\\=-3x^2+2x+8+x^2-6x-7\\=-2x^2-4x+1$

Final Answer:-

The number that should be substracted are $-2x^2-4x+1$.

Answer 2

Answer:

The answer is  -2x²-4x +1      

Given  problem:

What must be subtracted from -3x²+2x+8 to get  -x²+6x+7  

Step by-step explanation:

Given equations -3x²+2x+8  and  -x²+6x+7  

Let's assume that f(x) is subtracted from -3x²+2x+8 to get -x²+6x+7    

therefore  -3x²+2x+8 - f(x) =  -x²+6x+7  

now interchange  f(x) and -x²+6x+7    

then   -3x²+2x+8 + x²- 6x - 7 = f(x)  

f(x) = -3x²+2x+8 + x²- 6x-7    

f(x) =  -2x²- 4x +1