Factorisation of Quadratic Polynomial

Factorise: 5x^2+16x+3

•  $\left(x+3\right)\left(5x+1\right)$  

The factorisation of 4x² + 8x + 3 is

• (x + 1) (x + 3)

• (2x + 1) (2x + 3)

• (2x + 2) (2x + 5)

• (2x –1) (2x –3)

Answer explanation

To factorize 4x^2 + 8x + 3, find two numbers that multiply to 12 (product of 4*3) and add up to 8 (coefficient of x). The numbers are 2 and 6. Therefore, the factorization is (2x + 1) (2x + 3).

The factorisation of 4x ² + 8x + 3 is   

• (x + 1) (x + 3)

• (2x + 1) (2x + 3)

• (2x + 2) (2x + 5)

• (2x –1) (2x –3)

the coefficient of x ² in (3x+1)(x+2)

• 1

• 2

• 3

• 0

Tags

CCSS.HSA.APR.C.4

Factor Completely: x²-17x+72

• (x-9)(x+8)

• (x-9)(x-8)

• x(x-3)

• (x+9)(x+8)

• F

• G

• H

• J

Tags

CCSS.HSA.APR.B.3

Factor Completely: x²-7x-8

• (x+1)(x-8)

• (x+1)(x+8)

• 5(x+4)(x+5)

• (x-1)(x+8)

Factor the expression: x^2 - 5x + 6

• (x - 1)(x - 6)

• (x + 2)(x + 3)

• (x - 4)(x - 2)

• (x - 2)(x - 3)

The roots of the quadratic equation x^2-6x+9=0 using factorisation are:

• 3,3

• -3,3

• -3,3

• 6,9

Tags

CCSS.HSA-REI.B.4B

If one zero of the quadratic polynomial 2x²+kx-15 is 3, then find the other zero

• 2/5

• -5/2

• -5

• -2/5