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If |x2 – 12x + 32| + |x2 – 9x + 20| = 0. Then find the value of x.1. x = 52. x = 43. x = 84. x = 3 |
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Answer» Correct Answer - Option 2 : x = 4 CONCEPT: The modulus of a given function gives the magnitude of that function. Modulus Function is defined as the real valued function. The real function f: R → R defined by f (x) = |x|= x, x > 0, and f (x) = |x|= -x, if x < 0. ∀ x ∈ R is called the modulus function. CALCULATIONS: Given |x2 – 12x + 32| + |x2 – 9x + 20| = 0. Every modulus function is a non-negative function and if two non-negative functions add up to get zero then individual function itself equal to zero simultaneously. x2 – 12x + 32 for x = 4 or 8 x2 – 9x + 20 for x = 4 or 5 Both the equations are zero at x = 4 So, x = 4 is the only solution for this equation. |
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