Mathematics: If ( 4x - 2 ) ( x + 9 ) - 3x = ax2 + bx + c, what is the value of b. The 2 is and exponent please help me

400 that’s it and now I need to make this 20 charters long...

If ( 4x - 2 ) ( x + 9 ) - 3x = ax2 + bx + c, what - id4293212990013, harleycochran2ovyt3n

rhaquan66766

03.05.2021

b=31 in ax^2+bx+c

Step-by-step explanation:

Hi there!

( 4x - 2 ) ( x + 9 ) - 3x

Our goal is to expand this equation and put it in the form ax^2+bx+c . Firstly, multiply the first two binomials (in the parentheses):

$= 4x(x+9)-2(x+9)-3x\\= 4x^2+36x-2(x+9)-3x\\= 4x^2+36x-2x-18-3x$

Now, we can combine like terms (terms with like variables):

$= 4x^2+36x-2x-3x-18\\= 4x^2+31x-18$

Now, in this equation, we can easily identify that 31 is the value of b in ax^2+bx+c .

I hope this helps!

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