Question

factorise 4x square +8x square +x-3

Answer 1

Answer:

4x^2 + 8x +3

=4x^2 + 2x + 6x + 3 { 2x+6x=8x and 2x×6x=12x^2}

=2x(2x+1) + 3(2x+1)

=(2x+3) (2x+1)

Answer 2

$- 1 + - \sqrt{145 } \24$

Step-by-step explanation:

ADD 4X SQUARE AND 8X SQUARE

12xsquare+ x-3

USE THE QUADRATIC FORMULA

A=12, B=1,C=-3

$x = - b + - \sqrt{ {b}^{2} } - 4ac \div 2a$

x=

$x = - 1 + - \sqrt{ {1}^{2} - 4 \times 12 \times ( - 3)} \div 2 \times 12$

$x = - 1 + - \sqrt{1 + 144} \div 24$

$x = - 1 + - 145 \div 24$

x=-1+145÷24, -1-145÷24