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4vir4ik [10]
3 years ago
15

What's the product of these binomials (x-9) (x+2)

Mathematics
2 answers:
Brums [2.3K]3 years ago
6 0

Answer:

x² – 7x – 18

Step-by-step explanation:

stellarik [79]3 years ago
3 0

Answer:

(x-9)*(x+2)=x^2 - 7x -18

Step-by-step explanation:

Let's find the solution, but first we need to understand the following:

multiplication of binomials establish that:

(a-b)*(c+d)=(a*c) + (a*d) + ((-b)*(c)) + ((-b)*(d))

now, because your binomials are (x-9) and (x+2), using the above we obtain:

(x-9)*(x+2)=(x*x) + (x*2) + ((-9)*x) + ((-9)*2)

which can be simplified as:

(x-9)*(x+2)=x^2 + 2x - 9x -18

giving the solution:

(x-9)*(x+2)=x^2 - 7x -18

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