25^2=7^2 + x^2
49 + x^2 = 625
x^2= 576
square both sides
x=24
Answer:
(A) 
Step-by-step explanation:
To Simplify: The quantity 3 times x to the 4th power plus 5 times x to the 2nd power plus 2 times x all over x.
Solution: The given statement can be easily rewritten as:
,
and

Thus, according to the statement, the expression can be written as:

⇒
which is the required simplified expression.
Thus,option A is correct.
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;)
It should be B I know how to do it