Question

The polynomial
x2 + 3x - 40 represents the box’s area. Find the length and the width of the box written as two binomials.
Please help and explain

Answer 1

so you need factorizing completely this quadratic
try get two numbers with sum equal +3 and product equal -40

Answer 2

ive figured out the answer which is (x-5)(x+8), but i dont know how to explain it can you help with that?

Answer 3

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jhonyy9
so you need factorizing completely this quadratic
try get two numbers with sum equal +3 and product equal -40
\(\color{#0cbb34}{\text{End of Quote}}\)
look what i ve said above

you get (x-5)(x+8)

8+(-5) = +3
8*(-5) = -40

right ?

Answer 4

yes

Answer 5

@supie opinion pls ? ty

Answer 6

so what result from this ?

what are the length and width of the box ?

Answer 7

idk it only gave the area

Answer 8

yes this is the area

x^2 +3x -40 = (x-5)(x+8)

yes ?

Answer 9

yes, but i have to explain how i did that but i dont know the algebra words to do it

Answer 10

like do we use the greatest common factor to find this answer?

Answer 11

or not

Answer 12

please?

Answer 13

no you just need rewrite this quadratic binomial

Answer 14

@Laylalyssa can you explain it more easy understanding ? ty

Answer 15

Can you explain how you found the answer

Answer 16

x^2 +3x -40 = x*x +8x -5x +8*(-5) = x(x+8) -5(x+8) = (x-5)(x+8)