Advertisements
Advertisements
Question
Solve : x2 – 11x – 12 =0; when x ∈ N
Advertisements
Solution
x2 – 11x – 12 =0
`=> x^2 - 12x + x - 12 = 0`
=> x(x - 12) + 1(x - 12) = 0
=> (x - 12)(x + 1) = 0
then x = 12 and x = -1
Since `x in N` then x = 12
RELATED QUESTIONS
Solve for x : 12abx2 – (9a2 – 8b2 ) x – 6ab = 0
Find the roots of the following quadratic equation by factorisation:
`2x^2 – x + 1/8 = 0`
Solve the following quadratic equations by factorization:
`sqrt2x^2-3x-2sqrt2=0`
Solve the following quadratic equations by factorization:
`(x - 3)/(x + 3) - (x + 3)/(x - 3) = 48/7; x ≠ 3, -3`
Solve the following quadratic equation by factorization: \[\frac{a}{x - b} + \frac{b}{x - a} = 2\]
Solve the following quadratic equation using formula method only
x2 - 7x - 5 = 0
Solve equation using factorisation method:
`x + 1/x = 2.5`
Solve the equation 3x² – x – 7 = 0 and give your answer correct to two decimal places.
Solve the following equation by factorization
3(x – 2)2 = 147
Solve the following equation by factorization
`(x - 3)/(x + 3) + (x + 3)/(x - 3) = 2(1)/(2)`
