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Instructions
What will come in place of the question mark (?) in the given questions ?
Solution
Expression : $$34 \times 80 + ?^{2} = 7500 - 4251$$
=> $$2720 + (x)^2 = 3249$$
=> $$(x)^2 = 3249 - 2720 = 529$$
=> $$x = \sqrt{529} = 23$$
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