a) Which number is to be added toX2
+ 10 x to get a perfect square ?

b) Find the natural number value of x from

1 thought on “a) Which number is to be added toX2<br /> + 10 x to get a perfect square ? <br /><br />b) Find the natural number value of x from”

1. Answer:

   a)x²+10x+?=(x+?)²

   =>10x=2.x.?

   =>?= 5

   b)x²+10x=144

   =>x²+10x-144=0

   =>x²+18x-8x-144=0

   =>x(x+18)-8(x+18)=0

   =>(x+18)(x-8)=0

   =>x=(-18) or x=8

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