Please complete z2+9z-90=(z-6)(z+?) ...?

Mathematics

2 answers:

Pachacha [2.7K]3 years ago

8 0

Answer:

Answer would be 15.

Step-by-step explanation:

We have to complete the expression given as

$z^{2}+9z-90=(z-6)(z+?))$

We will try to factorize the expression given in the left side.

$z^{2}+9z-90=z^{2}+15z-6z-90$

= z(z+15)-6(z-15)

= $(z-6)(z-15)$

Now we will compare this factorized form with the right side of the expression.

(z-6) (z-15) (= (z-6) (z+?)

We find question mark is 15.

Therefore, the answer is 15.

notka56 [123]3 years ago

4 0

The answer is: (z - 6)(z + 15)

z² + 9z - 90 = z*z + 15z - 6z - 6*15 =
= (z*z + 15z) - (6z + 6*15) =
= z(z + 15) - 6(z + 15) =
= (z - 6)(z + 15)

You might be interested in

Ramesh buys 10 containers of juice from an online shop and 18 containers of the same juice from another shop.If the capacity of

frutty [35]

Answer:

Rs. 4200

Step-by-step explanation:

If Ramesh buys 10 containers, each for 150, we can add 150 + 150 + 150 + 150 + 150 + 150 + 150 + 150 + 150 + 150 (there's ten 150's).

Or, instead of doing a lot of adding, we can use multiplication (repetitive addition is the same thing as multiplication; but instead of adding over and over again, we multiply by how many "groups" of the number that we have. For example, let's say that our group size is 150. If we buy 10 containers, we have bought 10 x 150 containers.)

So, we can use 10 x 150 for the first ten containers. However, we can solve this problem in a slightly more practical way. We can first add the total amount of containers (the total amount of "groups" of 150), 10 + 18 = 28.

So, to solve this equation, we are finding 28 x 150.

150 x 28 = 4200

(150 = size of "group"/price of container)

(28 = amount of "groups"/containers)

So, the total amount of money spent by Ramesh is Rs. 4200

8 0

2 years ago

Pls help me, i dont know what i’m doing

Keith_Richards [23]

Answer:

The answer is in the pic above