Question

Please help me

Here are two expressions whose sum is a new expression, A.

(2x2+5)+(6x□−7)=A
Select all the values that we can put in the box so that A is a polynomial.

Answer 1

D, F and G

Explanation:

A polynomial must have a negative exponent for the variable term. So we can eliminate A, B and C

Also no fractional exponents so eliminate E

F & G are positive exponents so acceptable

D has the exponent 0 so the term becomes (2x² + 5) + (6x⁰ + 7)
x⁰ = 1 so the expression becomes 2x² + 5 + 6 + 7 = 2x² + 18 which is a polynomial.