Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions for Mathematics

Simplify.

(1.5x − 4y) (1.5x + 4y + 3) − 4.5x + 12y

Simplify.

(a + b + c) (a + b − c)

Write the following square of binomial as trinomial: (x + 2)²

Write the following square of binomial as trinomial:  (8a + 3b)²

Write the following square of binomial as trinomial:  (2m + 1)²

Write the following square of binomial as trinomial:  \[\left( 9a + \frac{1}{6} \right)^2\]

Write the following square of binomial as trinomial: 

\[\left( x + \frac{x^2}{2} \right)^2\]

Write the following square of binomial as trinomial:  \[\left( \frac{x}{4} - \frac{y}{3} \right)\]

Write the following square of binomial as trinomial:  \[\left( 3x - \frac{1}{3x} \right)^2\]

Write the following square of binomial as trinomial:  \[\left( \frac{x}{y} - \frac{y}{x} \right)^2\]

Write the following square of binomial as trinomial: \[\left( \frac{3a}{2} - \frac{5b}{4} \right)^2\]

Write the following square of binomial as trinomial: (a²b − bc²)²

Write the following square of binomial as trinomial:  \[\left( \frac{2a}{3b} + \frac{2b}{3a} \right)^2\]

Write the following square of binomial as trinomial:  (x² − ay)²

Compute the amount and the compound interest in  the following by using the formulae when:
Principal = Rs 3000, Rate = 5%, Time = 2 years

Compute the amount and the compound interest in  the following by using the formulae when:
Principal = Rs 3000, Rate = 18%, Time = 2 years

Compute the amount and the compound interest in  the following by using the formulae when:
Principal = Rs 5000, Rate = 10 paise per rupee per annum, Time = 2 years

Compute the amount and the compound interest in  the following by using the formulae when:
Principal = Rs 2000, Rate = 4 paise per rupee per annum, Time = 3 years

Compute the amount and the compound interest in  the following by using the formulae when:
Principal = Rs 12800, Rate = \[7\frac{1}{2} %\], Time = 3 years