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# What is the missing polynomial? _ - (20 - 4x - 5x^{2}) = 20 - 7x^{2}

**Solution:**

Polynomials are algebraic expressions that consist of variables and coefficients.

Variables are also sometimes called indeterminates.

Let the missing polynomial be a.

Given, a - (20 - 4x - 5x^{2}) = 20 - 7x^{2}

On rearranging,

a - 20 + 4x + 5x^{2} = 20 - 7x^{2}

Grouping of common terms,

a = 20 - 7x^{2} - 5x^{2} - 4x + 20

So we get

a = 40 - 12x^{2} - 4x

On rearranging

a = 40 - 4x - 12x^{2}

Therefore, the missing polynomial is 40 - 4x - 12x^{2}.

## What is the missing polynomial? _ - (20 - 4x - 5x^{2}) = 20 - 7x^{2}

**Summary:**

The missing polynomial in ? - (20 - 4x - 5x^{2}) = 20 - 7x^{2} is 40 - 4x - 12x^{2}.

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