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(0.456 * 0.456 – 0.228 * 0.228) / (0.456 + 0.228) = ________?

/ Mathematics Mcqs, Simplification and Approximation / By
(0.456 * 0.456 – 0.228 * 0.228) / (0.456 + 0.228) = ________?

A. 0.228
B. 0.456
C. 0.684
D. 1.0
Explanation:
(0.456 * 0.456 – 0.228 * 0.228) / (0.456 + 0.228)
This is the form of 7x/60 = 7 = a – b = 0.466 – 0.228 = 0.228