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ki77a [65]
3 years ago
15

Let ​ x² + 15x = 49 .​

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
3 0
x^{2} +15x+56.25=49
podryga [215]3 years ago
3 0

x^{2} + 15x = 49

for completing the squares , we have to add both sides the square of half of coefficient of x

So we add both sides (\frac{15}{2} )^{2}

or

(7.5)^2

x^{2} + 15x + (7.5)^2 = 49  +(7.5)^2

x^{2} + 15x +56.25 = 105.25

So these values will make it equivalent for completing the squares

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