Question

pick the quadratic equations.

a. x^3- 2x^2+ 1 = 0
b. 2x- 1 = 0
c. 5x^2+ 15x= 0
d. 6x- 1 = 4x+ 7

Answer 1

remember that .. the general form of a quadratic equation is :
\[\LARGE{ax^2+bx+c=0}\]

Answer 2

c is constant hence it can be 0 also ..

@helpme9283 can you compare that .. with the given options and tell ME that what you think?

Answer 3

hmm okay

Answer 4

try to do .. if you cant get what i told .. then no problem i will try to explain you with another diff. way ..

Answer 5

i think a and c is a quadratic expressions

Answer 6

see .. in a quadratic equation the degree (highest power of the variable ) is 2 .. but in a) it is 3

Answer 7

c is okay.. but again have a luk at the index of x in (a)

Answer 8

hmm okay and i'm not sure about d too.

Answer 9

so is it a and d? maybe?

Answer 10

in (d) thre r no x^2 terms. so it cannot be a qudratic eqn

Answer 11

so only c?

Answer 12

hence it is c)

Answer 13

yes..@helpme9283