Question

(3x+2) (3x4) use the identify​

Answer 1

Answer:

using distributive identity

Given to solve (3x+4)(3x-5)

Here let us use the identity :

(p+a)(p+b)=x^2+(a+b)p+ab

where p=3x

a=4

b=-5

Now lets solve

___________

(3x+4)(3x-5)

=(3x)^2+(4-5)3x+4*-5

=9x^2+-3x-20

Answer 2

Step-by-step explanation:

$(3x + 2)(3x + 4)$

(x + a)(x + b) = x² - b(x + a) - ax

x = 3, a = 2, b = 4

$(3x + 2)(3x + 4) = {3}^{2} - 4(3 + 2) - (2)(3)$

$= 9 - 4(5) - 6$

$= 9 - 20 - 6$

$= - 17$