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October 20, 2014

October 20, 2014

Posted by **Lucia** on Tuesday, July 19, 2011 at 5:04pm.

- algebra -
**Henry**, Tuesday, July 19, 2011 at 8:23pmEq1: L*W = 425Ft^2.

Eq2: 2L + 2W = 84Ft.

L + W = 42.

L e 42-W,

In Eq1, substitute 42-W for L:

(42-W)W = 425,

42W - W^2 - 425 = 0,

W^2 -42W + 425 = o,

(W-25)(W-17) = 0,

W-25 = 0,

W = 25.

W-17 = 0,

W = 17.

In Eq1 substitute 17 for W:

L*17 = 425,

L = 25 Ft., W = 17.

When L = 17, W = 25.

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