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Do we have to find x using quadratic formula or what?​

Do we have to find x using quadratic formula or what?​-example-1
User Gui Meira
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8.3k points

1 Answer

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Explanation:

The base of the separated triangle is (x+5) - (2x - 4) = x + 5 - 2x + 4 = 9 - x

So, area of the separated triangle would be:-

1/2 * b* h

or, 1/2 * (9-x)* (x+3)

or, (6x + 27 - x² )/2

Total area of trapezium = (6x + 27 - x²)/2 + (2x-4)(x + 3)

or, 60 = (6x + 27 - x²)/2 + 2x² + 2x - 12

or, 60 = (6x + 27 - x² + 4x² + 4x - 24)/2

or, 120 = 10x + 3x² + 3

or, 0 = 3x² + 10x + 3 - 120

hence, 3x² + 10x - 117 = 0 (proved)

Again,

Use quadratic formula to figure out value of x.

(It woun't be a natural number)

Write the value of x with only one digit after it's decimal.

Do we have to find x using quadratic formula or what?​-example-1
User Martin Vysny
by
8.2k points

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