Class 9 Maths & Science

The simplest form of ac + ad + bc + bd is

• (a+c)(b+b)

• ab(c+d)

• bc(c+d)

• (a+b)(c+d)

The factors of 4a² - 16 are

• 4(a-2)(a-2)

• 4(a-2)(a+2)

• (a-2)(a+2)

• 4(a+2)(a+2)

The value of 5.63 × 5.63 + 11.26 × 2.37 + 2.37 × 2.37 is

• 237

• 126

• 56

• 64

The coefficient of x in 7x²+6x-2 is 

• 2

• 6

• -2

• 7

Find the value of 7²-5²

• 22

• 23

• 24

• 25

The value of f(x) = 5x−4x²+3 when x = -1, is:

• 3

• -12

• -6

• 6

The zero of the polynomial f(x) = 2x+7 is

• 2/7

• -2/7

• 7/2

• -7/2

Velocity is defined as _____ per time.

• distance

• displacement

• power

• acceleration

What does the slope of the distance-time graph give?

• speed

• velocity

• acceleration

• displacement

________ coined the term “cell.”

• Gorbachev

• Himmler

• Robert Hooke

• Antonie van Leeuwenhoek