Question

please solve it for me​

Answer 1

Answer:

to verify the identity (a+b)2=a2+2ab+b2 by paper cutting and pasting for a = 8 cm and b = 2cmTo verify the identity (a + b)2 = a2 + 2ab + b2 by paper cutting and pasting.

Prerequisite Knowledge

Area of a square = (side)2.

Area of a rectangle = l x b.

Materials Required

A sheet of white paper, three sheets of glazed paper (different colours), a pair of scissors, gluestick and a geometry box.

Procedure

Take distinct values of a and b, say a = 4 units, b = 2 units

Cut a square of side a (say 4 units) on a glazed paper (blue).

Cut a square of side b (say 2 units) on glazed paper (pink).

Now, cut two rectangles of length a (4 units) and breadth b (2 units) from third glazed paper (red).

cbse-class-9-maths-lab-manual-algebraic-identity-a-b2-a2-2ab-b2-1

Answer 2

Answer:

Toothpaste is a paste or gel dentifrice used with a toothbrush to clean and maintain the aesthetics and health of teeth. ... The decline of tooth decay during the 20th century has been attributed to the introduction and regular use of fluoride-containing toothpastes worldwide