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Coordinate Geometry
Question
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Factorise the following using appropriate identities:

9x2 + 6xy + y2

Answer

9x2 + 6xy + y2
9x2 + 6xy + y2 = (3x)2 + 2(3x)(y) + (y)2
= (3x + y)2  = (3x + y) (3x + y)
    
                        | Using Identity 1
 

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Some More Questions From Coordinate Geometry Chapter

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.

4x2 - 3x + 7

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.

x10+ y3 + t50

Write the coefficients of x2 in each of the following:

2 + x2 + x

Write the coefficients of x2 in each of the following:
2 - x2 + x3