Question

Factorise the following:- 81p²-4m²-n²+ 4mm




who will give answer I will mark him brilliant star​

Answer 1

Answer:

Factorise the following :

(i)6a+6b

(ii)ax+bx

(iii)3x

2

−6a

6

(iv)9x

2

+3x

(v)12x

3

y−4xy

2

(vi)

2

1

x+

2

1

(vii)cdm+cdt

(viii)36a

2

b

3

−18a

3

b

2

(ix)25m

2

n

3

−5mn

(x)3ay+3az

(xi)185a+185b

(xii)28x−14y

(xiii)ax−ay

(xiv)12y

3

+6a

3

(xv)3x+9y

MEDIUM

ANSWER

(i) 6a+6b=6(a+b)

(ii) ax+bx=(a+b)x

(iii) 3x

2

−6a

6

=3(x

2

−2a

6

)=3(x−

2

a

3

)(x+

2

a

3

)

(iv) 9x

2

+3x=3x(3x+1)

(v) 12x

3

y−4xy

2

=4xy(3x

2

−y)

(vi)

2

1

x+

2

1

=

2

1

(x+1)

(vii) cdm+cdt=cd(m+t)

(viii) 36a

2

b

3

−18a

3

b

2

=18a

2

b

2

(2b−a)

(ix) 25m

2

n

3

−5mn=5mn(5mn

2

−1)

(x) 3ay+3az=3a(y+z)

(xi) 185a+185b=185(a+b)

(xii) 28x−14y=14(2x−y)

(xiii) ax−ay=a(x−y)

xiv) 12y

3

+6a

3

=6(2y

3

+a

3

)

(xv) 3x+9y=3(x+3y)