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Find the following products
1a) (x+2) (x-2)
(b) (d-8)(d-8)​

Answer 1

Answer:

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Class VIII Math

NCERT SOLUTIONS for ALGEBRAIC EXPRESSIONS

EXERCISE : 9.1

1. Construct the following quadrilaterals:

(i) Quadrilateral ABCD

(ii) Quadrilateral JUMP

1. Identify the terms, their coefficients for each of the following expressions:

(i) 5xyz2 – 3zy

(ii) 1 + x + x2

(iii) 4x2y2 – 4x2y2z2 + z2

(iv) 3 – pq + qr – rp

(v)

(vi) 0.3 a – 0.6 ab + 0.5 b

Sol. (i) 5xyz2 – 3zy

In the expression 5xyz2 – 3zy, the terms are 5xyz2 and –3zy.

coefficient of xyz2 in the term 5xyz2 is 5.

coefficient of zy in the term –3zy is –3.

(ii) 1 + x + x2

In the expression 1 + x + x2, the terms are 1, x and x2.

Coefficient of x° in the term 1 is 1.

Coefficient of x in the term x is 1.

Coefficient of x2 is the term x2 is 1.

(iii) In the expression 4x2y2 – 4x2y2z2 + z2, the terms are 4x2y2, –4x2y2z2 and z2.

Coefficient of x2y2 in the term 4x2y2 is 4.

Answer 2

Answer:

1- 2x- (-2)

2- 0 is answer for these questions