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Solve: (x + 4)2 – 4 = 16 O x= - 4+2V5 O O x= – 4 + 20 O x= 4 + V20 O x= +4

Solve: (x + 4)2 – 4 = 16 O x= - 4+2V5 O O x= – 4 + 20 O x= 4 + V20 O x= +4
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2 votes
Solve: (x + 4)2 – 4 = 16

O x= - 4+2V5
O
O x= – 4 + 20
O x= 4 + V20
O x= +4

Solve: (x + 4)2 – 4 = 16 O x= - 4+2V5 O O x= – 4 + 20 O x= 4 + V20 O x= +4-example-1
User Liong
by
8.6k points

1 Answer

5 votes

Answer:


{x} = - 4 \pm \: 2√(5)

Explanation:


{(x + 4)}^(2) - 4 = 16 \\ \\ \implies \: {(x + 4)}^(2) = 16 + 4 \\ \\ \implies \: {(x + 4)}^(2) = 20 \\ \\ \implies \: {(x + 4)} = \pm \: √(20) \\ \\ \implies \: {x + 4} = \pm \: 2√(5) \\ \\ \implies \: {x} = - 4 \pm \: 2√(5)

User Harpreet
by
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