Question

please answer this question

Answer 1

Step-by-step explanation:

Question no. 1

(3m-n)to the whole sq.

(A-B) whole sq. = Asq. -2AB+Bsq.

(3m)sq.-2*3m*n+(n)sq.

9m sq.-6mn+n sq.

Question no. 2

Product of 4x,3y,0,4z is 0 because any number which is multiplied by 0 is 0 itself.

Question no. 3

(a+b)(a-b)+(b+c)(b-c)+(c+a)(c-a)

= a sq.-b sq.+b sq.-c sq.+c sq.+a sq.

= 0

Question no. 4

Side = 12cm

Lateral surface area = 4(l)sq.

=4(12)sq.

= 144*4cm sq.

=576cm sq.

Question no. 5

Length = 5x(sq.)y

Breadth = 4xysq.

Area = L*b

=5x(sq.)y*4xysq.

= 20x(cube)y(cube)

Question no. 6

5