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Math Discovery method
Ito yung 3. What are dimensions of the pool? ​


Math Discovery Method Ito Yung 3 What Are Dimensions Of The Pool class=

Sagot :

Answer:

1.) L = x + 3

2.) A = (x + 3)x

3.) Dimensions: 7m x 4m

Step-by-step explanation:

Given:

Area of pool (A) = 28sq.m.

1.)  if x = width (W)

Length (L) = x + 3

2.)

A = LW

A = (x + 3)x

3..)

28 = (x + 3) x

28 = x² + 3x

x² + 3x - 28 = 0

by factoring:

(x +  7)(x -  4) = 0

x + 7 = 0

x = -7

x - 4 = 0

x = 4

say x = 4, W = 4

L = x + 3

L = (4) + 3

L = 7

check:

A = LW

28 = (7)(4)

28 = 28, ok