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## SS2: MATHEMATICS - 2ND TERM

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Lesson 4, Topic 5
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# Evaluating Formula

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#### Topic Content:

• Evaluating Formula

One of the most important applications of algebra is in the use of formula.

A formula is simply an equation which describes the relationship between two or more quantities.

Let A = $$\frac{1}{2} \scriptsize (a + b )h\! \!$$, where “a” and “b” are the parallel sides and “h” is the perpendicular distance between the parallel sides.

In this case, A is said to be the subject of the formula.

### Example 4.5.1:

Evaluate $$\frac{ax^2\:+ \:bx \:+\:c}{mx \:+\: c}$$

given that a = 2, x = -3, b = -2, c = 4 and m = -1  (WAEC)

Solution:

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