Q1 Simplify (x square-5) (x-2x)+5 and find the value at x=5.
Q2 If a+b=15 and ab=15 , find the value of a square + b square.
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a+b=15 and ab=15
(a+b)²= a²+ 2ab+ be 2
(a+b)² - 2ab = a²+b²
(15)22X15
225-40= q²+be
195= a²+b²
a+b²=195
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