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Popular >

3^{x+2}+3^x=90

Solution

3^{x + 2} + 3^{x} = 90

Solution

x = 2

Solution steps

3^{x + 2} + 3^{x} = 90

Factor

3^{x + 2} + 3^{x} : 10 \cdot 3^{x}

10 \cdot 3^{x} = 90

Divide both sides by

10

3^{x} = 9

Apply exponent rules

x = 2

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Frequently Asked Questions (FAQ)

What is the answer to 3^{x+2}+3^x=90 ?
The answer to 3^{x+2}+3^x=90 is x=2
Solve for x: 3^{x+2}+3^x=90
The solution is x=2