Algebraic Expressions NCERT Grade 7 Ex. 12.3

Algebraic Expressions and Polynomials

Write the number of terms in each of the following algebraic expressions : 2x-:2y-7x^(2)+3

Write down the algebraic expressions whose terms are : 3a, -4b, 7c

Find the sum of the following algebraic expressions : 7a^(2) - 5a + 2 , 3a^(2) - 7 , 2a + 9 , 1+ 2a - 5a^(2)

Find the value of each of the following algebraic expressions. ab- 3b + 7c, where a = 5, b = 7, c = 4

Find the sum of the following algebraic expressions : 3a - 4b + 5c , 2a + 3b - 6c , - 5a + 8b + 7c

Add the following algebraic expressions : (i) 5x^(3)- 3x + 7 , 2x^(2) - 11 and 7x^(3) - 11x^(2) + 4x- 3

Write the algebraic expressions for the following. 12 more than the sum of two-thirds of a number a and four-fifths.

Write the following statements in the form of algebraic expressions. m subtracted from the product of 12 and n.

Write down the algebraic expression whose terms are : 2x,-(3)/(x),(7y)/(x^(2)),5z,-1