Question

What is the missing coefficient?

(15x2 + 11y2 +8x)-( 7x² +5y2 + 2x) = Ox? +By+6x
A.4
B.8
C10
D22

Answer 1

B is the Answer on 2020 edge

Explanation:

Answer 2

For this case we have the following expression:

`(15x ^ 2 + 11y ^ 2 + 8x) - (7x ^ 2 + 5y ^ 2 + 2x) =`

We eliminate the parentheses taking into account that:

`- * + = -\\15x ^ 2 + 11y ^ 2 + 8x-7x ^ 2-5y ^ 2-2x`

We add similar terms:

`15x ^ 2-7x ^ 2 + 11y ^ 2-5y ^ 2 + 8x-2x =`

Different signs are subtracted and the sign of the major is placed:

`8x ^ 2 + 6y ^ 2 + 6x`

Finally, the expression is reduced to:

`8x ^ 2 + 6y ^ 2 + 6x`

Answer:

`8x ^ 2 + 6y ^ 2 + 6x`

Option B