Question

please give the answer fast

Answer 1

HEYA MATE, HERE IS UR ANSWER ______________

(a+b)^2=a^2+b^2+2ab

(a+b)^2=145+2×72

(a+b)^2=145+144

(a+b)^2=289

a+b=root 289

a+b=17


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Answer 2

HERE IS YOUR ANSWER..⤵⤵

▶SOLUTION ➡

Given,

$a {}^{2} + b {}^{2} = 145 \\ \\ ab = 72$



We know that,


$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2} \\ \\ = > (a + b) {}^{2} = (a {}^{2} + b {}^{2} ) + 2ab \\ \\ = > a + b = \sqrt{(a {}^{2} + b {}^{2}) + 2 ab} \\ \\ = > a + b = \sqrt{145 + 2 \times 72} \\ \\ = > a + b = \sqrt{145 + 144} \\ \\ = > a + b = \sqrt{289} \\ \\ = > a + b = 17$

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