3 years ago

(x+5)to the second power -4=12

Mathematics

1 answer:

Softa [21]3 years ago

5 0

Answer:

x = 3i

Step-by-step explanation:

(x+5)² - 4 = 12

simplify (x+5)²

x × x + 5 × 5 - 4 = 12

x² + 25 - 4 = 12

x² + 21 = 12

combine the like terms

x² = 12 - 21

x² = -9

square root both sides to solve for x

√x² = √-9

the square cancels the square root, so we have

x = √-9

x = 3i

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(x+5)to the second power -4=12​

(x+5)to the second power -4=12