plz answer it with explanation plz I have exam tomorrow
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Answer: B is the correct answer
Step-by-step explanation:
Rahul107007:
where is the explanation?
in my comments
Answered by
2
Answer: 9
Step-by-step explanation:
x² - 6x = 16
To make LHS a perfect square:
Take half the coefficient of 'x' :- -6/2 = -3
Now square this: (-3)² = 9
Add this to LHS [and RHS too]
x² - 6x + 9 = 16 + 9
(x - 3)² = 25
Now the LHS is a 'Perfect Square'. The term added was '9'.
{Concept used (a-b)² = a² - 2*a*b - b² ... a² = x² ; 2*a*b = -6x.. so 'b' = -6x/2 = -3}
May I know whether there is any error either in my approach or in the understanding of the question (pattern)
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