If C = x2 + 7 and D = 3x2 - 4x + 3, find an expression that equals 3C + 3D in standard form.

Question

asked Aug 23, 2022 1.4k views

1 Answer

Evpok · Answer 1 · 2022-08-28T05:06:30+0000

Answer:

The new expression is: 12 x^2 - 12 x+ 30

Explanation:

if C = x^2 + 7

and

D = 3 x^2 - 4 x + 3

Then, 3 C + 3 D can be obtained via:

3 ( x^2 + 7 ) + 3 ( 3 x^2 - 4 x + 3 ) = 3 x^2 + 21 + 9 x^2 - 12 x + 9 =

= 12 x^2 - 12 x+ 30