Home
Class 10
MATHS
Solve : (i) 2x^(2)-7x=39 (ii) x^(2)=...

Solve :
(i) `2x^(2)-7x=39`
(ii) `x^(2)=5x`
(iii) `x^(2)=16`

Text Solution

Verified by Experts

The correct Answer is:
(i) `x=(13)/(2)`, or `x=-3`
(ii) `x=0`, or `x=5`
(iii) `x=-4`, or `x=4`
Promotional Banner

Topper's Solved these Questions

  • QUADRATIC EQUATIONS

    ICSE|Exercise Exercise 5(A)|5 Videos

  • QUADRATIC EQUATIONS

    ICSE|Exercise Exercise 5(B)|5 Videos

  • PROBABILITY

    ICSE|Exercise EXERCISE 25(C)|106 Videos

  • QUESTION PAPER 2019

    ICSE|Exercise SECTION B |20 Videos

Similar Questions

Explore conceptually related problems

Without solving, find the nature of the roots of the following equations: (i) 3x^(2)-7x+5=0 . (ii) 4x^(2)+4x+1=0 . (iii) 3x^(2)+7x+2=0 . (iv) x^(2)+px-q^(2)=0 .

Solve : (i) 2x^(2)-5x+3=0 (ii) (x^(2)+3x)^(2)-(x^(2)+3x)-6=0, xepsilonR

Factorise the following : (i) x^(2)+7x+12 " " (ii) x^(2)+18x+45 " " (iii) x^(2)-7x+12 " "(iv) x^(2)-25x-84

Without solving, examine the nature of the roots of the equations : (i) 5x^(2)-6x+7=0 (ii) x^(2)+6x+9=0 (iii) 2x^(2)+6x+3=0

Which of the following are polynomials ? (i) x^(2)-3x+1 " " (ii) x^(2)+5x+2 " "(iii) x-(1)/(y) " " (iv) x^(7)+8 " " (v) x^(3)+sqrt(x)-2 (vi) sqrt(2)x^(2)+x-1 " " (vii) (3x-1)(x+5) " " (viii) (x-(3)/(x))(x+2) " " (ix)2x^(2)-1 (x) x+(1)/(sqrt(x))+2

Solve : (i) (x^(2)-x)^(2)+5(x^(2)-x)+4=0 (ii) (x^(2)-3x)^(2)-16(x^(2)-3x)-36=0

Find the roots of the following quadratic equations by the method of completing the square : (i) x^(2)-10-24=0 (ii) 2x^(2)-7x-39=0 (iii) 5x^(2)+6x-8=0

Examine the nature of the roots of the equations (i) 2x^(2)+2x+3=0 (ii) 2x^(2)-7x+3=0 (iii) x^(2)_5x-2=0 (iv) 4x^(2)-4x+1=0

Solve each of the following equations for x and give, in each case, your answer correct to 2 decimal places : (i) 2x^(2)-10x+5=0 (ii) 4x+(6)/(x)+13=0 (iii) x^(2)-5x-10=0

Factorise (i) x^(2)+9x+18 (ii) 6x^(2)+7x-3 (iii) 2x^(2)-7x-15 (iv) 84-2r-2r^(2)