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Mathematics 7 Online
OpenStudy (anonymous):

What value should be added to the expression to create a perfect square? x2 – 10x A. 25 B. –100 C. 5 D. 100

OpenStudy (anonymous):

@jagr2713

jagr2713 (jagr2713):

Give me a sec

OpenStudy (anonymous):

okay!!:)

jagr2713 (jagr2713):

ok first we use this formula c=(b/2)^2

OpenStudy (anonymous):

ok

jagr2713 (jagr2713):

So b is 10 right?

jagr2713 (jagr2713):

So plug it in and solve

OpenStudy (anonymous):

plug it into x?

OpenStudy (anonymous):

|dw:1433024390033:dw|

jagr2713 (jagr2713):

10/2 ^2=

OpenStudy (anonymous):

25?

jagr2713 (jagr2713):

Correct

OpenStudy (anonymous):

so A is correct? @jagr2713

jagr2713 (jagr2713):

Correct

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