The length of a rectangle (X) is greater than its breadth by 3cm. The area of a rectangle is 70sq.cm.Find the values of X.
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The area if rectangle is l×b
let length be x
breadth=x+3
Area is 70cm²
Therefore,
x(x+3)=70
x²+3x=70
x²+3x-70=0
factarisation
x²+10x-7x-70=0
x (x+10)-7(x+10)=0
(x+10)(x-7)=0
x+10=0!!!!x-7=0
x=-10!!!x=7
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