Advertisements
Advertisements
प्रश्न
Solve the following equation: 3x2 + 25 x + 42 = 0
Advertisements
उत्तर
3x2 + 25 x + 42 = 0
`"x"^2 + 25/3 "x" + 14 = 0`
`"x"^2 + 6"x" + 7/3 "x" + 14 = 0`
`"x"("x" + 6) + 7/3 ("x" + 6) = 0`
`("x" + 6)("x" + 7/3) = 0`
(x + 6) = 0 , `("x" + 7/3) = 0`
x = -6 , x = `-7/3`
APPEARS IN
संबंधित प्रश्न
Solve the following quadratic equations by factorization:
4x2 + 5x = 0
Solve the following quadratic equations by factorization:
`4/(x+2)-1/(x+3)=4/(2x+1)`
Solve the following quadratic equations by factorization:\[\frac{1}{x - 3} + \frac{2}{x - 2} = \frac{8}{x}; x \neq 0, 2, 3\]
If the sum of the roots of the equation x2 − x = λ(2x − 1) is zero, then λ =
Solve the following : `("x" - 1/2)^2 = 4`
A two digit number is such that the product of the digits is 14. When 45 is added to the number, then the digit are reversed. Find the number.
The side (in cm) of a triangle containing the right angle are 5x and 3x – 1. If the area of the triangle is 60 cm². Find the sides of the triangle.
An aeroplane travelled a distance of 400 km at an average speed of x km/hr. On the return journey the speed was increased by 40 km/hr. Write down the expression for the time taken for
the return Journey. If the return journey took 30 minutes less than the onward journey write down an equation in x and find its value.
Solve the following equation by factorization
`x/(x + 1) + (x + 1)/x = (34)/(15)`
Is 0.2 a root of the equation x2 – 0.4 = 0? Justify
