**New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 8 Factorisation of Algebraic Expressions Self Practice 6D Solution**

**State whether or not the expression is a trinomial square. If it is, factorise the expression.**

**(1) a ^{2} + 4ab + 4b^{2}**

**(2) 4x ^{2} – 4x + 1**

**(3) 36p ^{2} – 60pq + 25q^{2}**

**(4) x ^{2} – 2xy – y^{2}**

**(5) 49y ^{2} – 14y + 1**

**(6) 9x ^{2}y^{2} + 6xyz + z^{2}**

**(7) 4m ^{2} + 24m + 9**

**SOLUTION Number 1 to 7 Solution:**

**(8) 16b ^{2} – 60by + 25y^{2}**

**(9) 49x ^{4} – 112x^{2}y^{2} + 64y^{4}**

**(10) 25x ^{2} + 20x + 1**

**(11) x ^{2} / 9y^{2} – 2/15 + y^{2} / 25x^{2}**

**(12) a ^{2} + a + ¼**

**(13) 1 + 18pq + 81p ^{2}q^{2}**

**(14) 4 – 20b + 25b ^{2}**

**(15) 4/9x ^{2} + 16/15xy + 16/25y^{2}**

**SOLUTION Number 8 to 15 Solution:**