If a2 + b2 = 126 and ab = 35, find the value of
a+b.
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Explanation:
a²+b² = 126. -------- i
ab = 35
2ab = 70. -------ii
add both eqⁿ
a²+b²+2ab = 126+70
a²+b²+2ab = (a+b)² = 196
(a+b)= √196
a+b = 14
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