Q1) Add the product of 9x^4( x^2- 2),5x^6(2x + 3) and (x^3 - 3x^2) (4x^2-3x^3),step by step explain ation
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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.