Question

Factorise the following algebraic expressions \( a^{2}-b^{2}=(a+b)(a-b) \). (i) \( z^{2}-16 \) (ii) \( 9-4 y^{2} \) (iii) Factorise the following using suitable identity. (i) \( x^{2}-8 x+16 \) (ii) \( y^{2}+20 y+100 \) (iii) \( 36 m^{2}+60 m+25 \) (iv) \( 64 x^{2}-112 x y+49 y^{2} \) () \( a^{2}+6 a b+9 b^{2}-c^{2} \)

Answer 1

varsha6004, hello 

(i) (z+4)(z-4)

(ii) (3+2y)(3-2y)

(iii)

 (i) (x-4)²

 (ii) (y+10)²

 ^{(iii) (6m+5)}2

 (iv) (8x-7y)²

 (v) (a+3b-c)(a+3b+c)

 Please let me know if this helps.