Home
Class 7
MATHS
Find the values of the following express...

Find the values of the following expressions for `x=2.` (i) `x+4` (ii) `4x-3` (iii) `19-5x^2` (iv) `100-10x^3`

Text Solution

Verified by Experts

(i) `x+ 4 = 2+4 = 6`
(ii) `4x-3 = 4(2)-3`
`= 8-3=5`
(iii) `19- 5x^2 = 19 5(2)^2`
`= 19-20 = -1`
(iv) `100-10x^3`
`= 100- 10(2^3)`
`= 100-80= 20`
...
Promotional Banner

Topper's Solved these Questions

  • ALGEBRAIC EXPRESSIONS

    NCERT|Exercise EXERCISE 12.3|10 Videos

  • ALGEBRAIC EXPRESSIONS

    NCERT|Exercise EXERCISE 12.1|7 Videos

  • ALGEBRAIC EXPRESSIONS

    NCERT|Exercise EXERCISE 12.1|7 Videos

  • COMPARING QUANTITIES

    NCERT|Exercise SOLVED EXAMPLES|21 Videos

Similar Questions

Explore conceptually related problems

Find the value of the following expressions for x=2i)x+4 ii) 4x-3 ii) 19-5x^(2) iv 100-10x^(3)

Find the value of the following expressions, when x=-1 (i) 2x-7( ii) -x+2 (iii) x^(2)+2x+1 (iv) 2x^(2)-x-2

Find the number of tems in the following expressions. (i) 3x^(2)y " "(ii) 4x^(3)-y^(3)" "(iii) 5x^(5)+y-2

(i) x^(4) (ii) x^(-3) (iii) 3x^(2)

Find all possible values of the following expressions : (i) sqrt(x^(2)-4) (ii) sqrt(9-x^(2)) (iii) sqrt(x^(2)-2x+10)

Find the value of the polynomial 5x-4x^(2)+3 at : (i)x=0 " " (ii) x=-1 " " (iii) x=2

Find the value of the polynomial 5x-4x^(2)+3 at (i) (ii) (ii) x=2

Identify monomials, binomials and trinomials from the following expression: (i) -3xyz (ii) 4x^(2) yz + 9 - 5x^(3) (iii) -7 (iv) x^(2) + y^(2) + z^(2) - p^(2) (v) x + 5 (vi) 6a^(3) b