Home
Class 8
MATHS
Factorise the expressions and divide the...

Factorise the expressions and divide them as directed. (i) `(y^2+7y+10) -: (y+5)` (ii) `(m^2-14m-32) -: (m+2)` (iii) `(5p^2-25p+20) -: (p-1)` (iv) `(4yz(z^2+6z-16) -: 2y (z+8)` (v) `5pq(p^2-q^2) -: 2p(p+q)` (vi) `12xy (9x62-16y^2) -: 4xy (3x+4y)` (vii) `39y^3(50y^2-98) -: 26y^2(5y+7)`

Text Solution

AI Generated Solution

Let's solve each part of the question step by step. ### (i) Factorise and divide `(y^2 + 7y + 10) -: (y + 5)` 1. **Factor the quadratic expression**: - We need to factor \(y^2 + 7y + 10\). - We look for two numbers that multiply to \(10\) (the constant term) and add up to \(7\) (the coefficient of \(y\)). - The numbers \(2\) and \(5\) work because \(2 \times 5 = 10\) and \(2 + 5 = 7\). ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • FACTORISATION

    NCERT|Exercise EXERCISE 14.4|21 Videos
  • FACTORISATION

    NCERT|Exercise EXERCISE 14.2|5 Videos
  • EXPONENTS AND POWERS

    NCERT|Exercise SOLVED EXAMPLES|9 Videos
  • INTRODUCTION TO GRAPHS

    NCERT|Exercise EXERCISE 15.2|4 Videos

Similar Questions

Explore conceptually related problems

Factorise the expressions and divide them as directed. (y 2 y 10) 5) ll) (m 14m 32) (m 2) (ii) (5p 25p 20) (p -1) (iv) 4yz(z (v) 5pq (p2 -q2) 2p(p q) -98) 26y (5y 7) (vi) 12ry(9x2 16y2) 4xy (3x 4y) (vii 39y (50y

Factorise the expressions. (i) ax^2 + bx (ii) 7p^2 + 21q^2 (iii) 2x^3 + 2xy^2 + 2xz^2 (iv) am^2 + bm^2 + bn^2 + an^2 (v) (lm + l) + m +1 (vi) y(y+z) + 9(y+z) (vii) 5y^2 - 20y - 8z + 2yz (viii) 10ab + 4a + 5b +2 (ix) 6xy - 4y + 6 - 9x

Divide as directed.( i 5(2x+1)(3x+5)-:(2x+1) (ii) 26xy(x+5)(y-4)-:13x(y-4)( iii) 52pqr(p+q)(p+r)(r+p)-:104pq(q+r)(r+p)

Solve the following quadratic equations by factorisation method : (i) x^(3) - 4x + 3 = 0 (ii) m^(2) - m - 2 = 0 (iii) p^(2) + 9p + 20 =0 (iv) q^(2) + q-12= 0 (v) y^(2) + 2y - 35= 0 (vi) 3x^(2) + 5x= 0 (vii) x^(2) - 7x + 12=0 (viii) x^(2) - 7x - 18 = 0

Find the centre and radius radius of the following circles : (i) (x-1)^(2)+(y+2)^(2)=16 (ii) (x+2)^(2)+y^(2)=25 (iii) (x+p)^(2)+(y+q)^(2)=p^(2)+q^(2) (iv) x^(2)+y^(2)=7

If p(y)=4+3y-y^(2)+5y^(3) , find (i) p (0) , (ii) p(2) , (iii) p(-1) .

If x = 1, y = 2 and z = 5, find the value of (i) 3x - 2y + 4z (ii) x^(2) + y^(2) + z^(2) (iii) 2x^(2) - 3y^(2) + z^(3) (iv) xy + yz - zx (v) 2x^(2) y - 5yz + xy^(2) (vi) x^(3) - y^(3) - z^(3)

Subtract: (i) -8xy from 7xy (ii) x^(2) from -3x^(2) (iii) (x - y) from (4y - 5x) (iv) (a^(2) + b^(2) - 2ab) from (a^(2) + b^(2) + 2ab) (v) (x^(2) - y^(2)) from (2x^(2) - 3y^(2) + 6xy) (vi) (x -y + 3z) from (2z - x - 3y)

Factorise. (i) x^2 + xy + 8x + 8y (ii) 15xy - 6x + 5y - 2 (iii) ax + bx - ay - by (iv) 15pq + 15 + 9q + 25p (v) z - 7 + 7xy - xyz

Factorise. (i) 4p^2 - 9q^2 (ii) 63a^2 - 112b^2 (iii) 49x^2 - 36 (iv) 16 x^5 - 144x^3 (v) (l + m)^2 - (l--m)^2 (vi) 9x^2y^2 - 16 (vii) (x^2 - 2xy + y^2) - z^2 (viii) 25a^2 - 4b^2 + 28bc - 49c^2