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sp2606 [1]
3 years ago
12

Solve the following equations 5^2x-2(5^x)-15=0

Mathematics
1 answer:
castortr0y [4]3 years ago
5 0

Answer:

x = 1

Step-by-step explanation:

{5}^{2x}  - 2( {5}^{x} ) - 15 = 0

( {5}^{x}  {)}^{2}  - 2 \times  {5}^{x}  - 15 = 0

{t}^{2}  - 2t - 15 = 0

{5}^{x} t =  - 3 \:  \: .5

{5}^{x}  = 5

x = 1

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