Question

25x=45²-30²
solve using identeties
plz
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Answer 1

Answer:

25x=(45+30)(45-30) (a²-b²=(a+b)(a-b) )

SO,

25x=75 X 15

x=45

Answer 2

Given :

${45}^{2} = 2025$

${30}^{2} = 900$

Finding the answer :

$25x = 2025 - 900$

$25x = 1125$

$x = \frac{1125}{25}$

$x = 45$

The answer is 45.