Ch 1

Question 1

Quadratic equation

Answer 1

An equation which contains the square of an unknown variable quantity but no higher power is called or an equation of the second degree
Ax²+bx+c=0

Question 2

Solution

Answer 2

Factorization
Completing square
Quadratic formula

Question 3

Reciprocal equation

Answer 3

An equation is said to be a reciprocal equation if it remains unchanged when X is replaced by1/x

Question 4

Exponential equation

Answer 4

In exponential equation variable occurs in exponent

Question 5

Radical

Answer 5

An equation involving expression under the radical sign

Question 6

Ratio

Answer 6

A relation between two quantities of the same kind

Question 7

Proportion

Answer 7

A proportion is a statement which is expressed as an equivalence of two ratios

Question 8

Variation direct

Answer 8

If two quantities are related in such a way that increase and decrease in one quantity causes increase or decreases in another quantity

Question 9

Inverse

Answer 9

When one quantity increases the other decreases or if one quantity decreases the other increases

Question 10

Third proportion

Answer 10

If quantities are related as a:b=b:c
Then c is called third proportion

Question 11

Fourth

Answer 11

A:b=c:d then d is fourth proportion

Question 12

Invertendo

Answer 12

a:b=c:d then b:a=d:c

Question 13

Alternando

Answer 13

a:c=b:d

Question 14

Componendo,dividendo

Answer 14

a+b:b=c+d:d
a-b:b=c-d:d

Question 15

Joint variation

Answer 15

A combination of direct and inverse variations of more than one variable forms joint..