Write the factored form of this trinomial 9x^2+18x-7

Step-by-step explanation:

To write the factored form, multiply a*c from the standard form . Here it is 9*-7 = -63.

Then find factors of -63 that add to b=18.

63: 1, 3, 7, 9, 21, 63

-21 + 3 =18

Split the middle term into -21x + 3x and factor by grouping.

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.