Question

(3х + 5.5) (3х – 0.5) special products and expansion​

Answer 1

Question :

(3x + 5.5) (3x – 0.5) special products and expansion

Formula Used :

$\tt (x + a)(x - b) = {x}^{2} + ax + bx + ab$

Here,

x = 3x

a = 5.5

b = 0.5

Solution :

$\sf(x + a)(x + b)$

$\sf {x}^{2} + (a + b)x + ab$

$\sf {9x}^{2} + (5.5 + 0.5)3x + 5.5 \times 0.5$

$\rm \: 9 {x}^{2} + 6 \times 3x + 2.75$

$\sf9 {x}^{2} + 18x + 2.75$

$\sf \: So \: the \: answer \: is \: \boxed{ \: 9 {x}^{2} + 18x + 2.75}$

Answer 2

Answer:

9x2 + 15x + 2.75

Step-by-step explanation:

3x(3x - 0.5) + 5.5(3x + 0.5)

9x2 - 1.5x + 16.5x + 2.75

9x2 + 15x + 2.75

Hope my answer will help you