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vlabodo [156]
4 years ago
7

What values of b satisfy 3(2b + 3)^2 = 36?

Mathematics
1 answer:
goldfiish [28.3K]4 years ago
5 0
3(2b + 3)² = 36

Divide both sides by 3.

3(2b + 3)² / 3 = 36/3

(2b + 3)² = 12

Take the square root of both sides.

√(2b + 3)² = √12

(2b +3) = +√12 or -√12

Solving when:

2b + 3 =  +√12                                                        2b + 3 =  -√12

2b = √12 - 3                                                            2b = -√12 - 3

b = (√12 - 3)/2        √12 ≈ 3.46                              b = (-√12 - 3)/2

 b ≈  (3.46 - 3)/2                                                       b ≈  (-3.46 - 3)/2

b ≈ 0.46/2                                                                   b ≈ -6.46/2

b ≈ 0.23                                                                        b ≈ -3.23

Therefore  b ≈ 0.23  or  -3.23       

Hope this helps.
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