Algebraic Expressions Test

Result

Algebraic Expressions Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

If x = 11c⁴ + 21c³ + 12c² - 9c + 5, y = 26c³ - 10c² - 9c + 7 and z = -10c² + 7c + 9, then x - y + z is equal to

A
10c⁴ - 5c³ + 12c² + 7c + 10

B
12c⁴ - 6c³ + 12c² + 7c + 7

C
11c⁴ - 5c³ + 12c² + 7c + 7

D
13c⁴ - 5c³ + 12c² + 7c

Solution

x - y + z

= (11c⁴ + 21c³ + 12c² - 9c + 5) - (26c³ - 10c² - 9c + 7) + (-10c² + 7c + 9)

= 11c⁴ + 21c³ + 12c² - 9c + 5 - 26c³ + 10c² + 9c - 7 - 10c² + 7c + 9

= 11c⁴ - 5c³ + 12c² + 7c + 7
Question 2
1 / -0

How many monomials are there?

(i) 5m²n
(ii) 3xy + 5x + 1
(iii) 5x³ - 9y²
(iv) a

A
4

B
3

C
2

D
1

Solution

Monomial: An algebraic expression which consists of one non-zero term only is called a monomial.

(i) 5m²n
(ii) a