Answer:
you can sign up with trusted members with http://trustedhelpers.brainly.com/
Step-by-step explanation:
Answer:
its c bru
Step-by-step explanation:
Answer:
![f( - 1) = - 1](https://tex.z-dn.net/?f=f%28%20-%201%29%20%3D%20%20-%201)
Step-by-step explanation:
![f(x) = {x}^{2} + 2x](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20%2B%202x)
<u>Substitute</u><u> </u><u>x</u><u> </u><u>=</u><u> </u><u>-</u><u>1</u><u> </u><u>in</u><u> </u><u>the</u><u> </u><u>equation</u><u>.</u><u> </u>
![f( - 1) = {( - 1)}^{2} + 2( - 1) \\ f( - 1) = 1 - 2 \\ f( - 1) = - 1](https://tex.z-dn.net/?f=f%28%20-%201%29%20%3D%20%20%7B%28%20-%201%29%7D%5E%7B2%7D%20%20%2B%202%28%20-%201%29%20%5C%5C%20f%28%20-%201%29%20%3D%201%20-%202%20%5C%5C%20f%28%20-%201%29%20%3D%20%20-%201)
Answer:
90
Step-by-step explanation:
Answer:
When subtracting expressions, we are applying the distributive property, where a multiple of an expression in brackets is applied to to each term.
e.g.
a(x + y) = ax + ay
In the case of subtracting an expression, we're doing the same thing, but in the example above, "a" would be equal to -1.
(a + b) - (c + d) ≡ (a + b) + -1(c + d)
And so the negative one is distributed across the terms within the brackets.