Question

To represent word problem in the form of quadratic equations, suppose the unknownrequired quantity can be taken as some of variable x and express the given condition in the form of x to form an equation in x. Then we express the equation in the descending powers of x. Thus standardquadratic equation is ax²+bx+c=0, a≠0.

1.The product of two consecutive even integers is 128, the quadratic equation to find the integers is
A) x² + 2x - 128 = 0
B) x² + x - 128 = 0
C) x² - 2x - 128 = 0
D) x² + 2x = - 128

2.A train travels a distance of 480 km at a uniform speed. If the speed had been 8 km/hr more, then it would have taken 2 hours less to cover the same distance. The quadratic equation is
A) x²+8x+480
B) x²+8x-1920=0
C) x²-x+200=0
D) x²+8x-480=0

3.Sandeep's father is 30 years older than him. The product of their ages 2 years from now will be 400. To find Sandeep's present age, the equation is
A) x²+9x-13 = 0
B) x²+32x+400=0
C) x²+34x-336=0
D) x²-34x+90=0

Kindly answer these 3 questions



​

Answer 1

Answer:

ok

Step-by-step explanation:

Answer 2

Answer:

Ans 1): b) x^2+x-128=0

Ans 2): b) x^2+8x-1920=0

Ans 3): c) x^2+34x-336=0