In the expression a2 + 2ab, values of both variables a and b are increased by 25%. By how much will the value of expression increase?25ab%25(a+b)%56.25%43.48%
Question
In the expression a2 + 2ab, values of both variables a and b are increased by 25%. By how much will the value of expression increase?25ab%25(a+b)%56.25%43.48%
Solution
To solve this problem, we need to first understand what the expression looks like after both variables a and b are increased by 25%.
If a is increased by 25%, the new value of a, let's call it a', is 1.25a. Similarly, if b is increased by 25%, the new value of b, let's call it b', is 1.25b.
Now, let's substitute these new values into the expression:
a'² + 2a'b' = (1.25a)² + 2(1.25a)(1.25b) = 1.5625a² + 2.5ab.
The original expression was a² + 2ab, and the new expression is 1.5625a² + 2.5ab.
To find out by how much the value of the expression increased, we need to subtract the original expression from the new one:
(1.5625a² + 2.5ab) - (a² + 2ab) = 0.5625a² + 0.5ab.
This means the expression increased by 56.25% of a² and 50% of 2ab.
So, the total increase is 56.25% of the original expression.
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