Instructions

What will come in place of the question mark (?) in the given questions ?

Question 115

$$34 \times 80 + ?^{2} = 7500 - 4251$$

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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