Compare the structure of the two expressions.
Expression 1
Expression 2
3x
4x + 9(2x + 1) x² + 6(-2x + 1) - 3(7 + x?)

Step-by-step explanation:

1. 3x

This is a single term with one variable of the first degree.

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2. 4x + 9(2x + 1) x² + 6(-2x + 1) - 3(7 + x?)

This is a sum of 4 terms, some of which can be expanded:

The expression can be simplified by combining like terms.

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.