What will come in place of question mark (?) in the given questions ?
$$\sqrt{?}+19=\sqrt{1225}$$
Expression : $$\sqrt{?}+19=\sqrt{1225}$$
=> $$\sqrt{x} + 19 = 35$$
=> $$\sqrt{x} = 35 - 19 = 16$$
=> $$x = (16)^2 = 256$$
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