Use the distributive property to expand the expression. 5x2 − (6x − 4y) + 9z

5x² − 6x + 4y + 9 z

Step-by-step explanation:

5x^2 −1(6x − 4y) + 9z

You see the -1 in front of (6x-4y) that is actually there, it is just disguised as a - sign. When you take away the ()'s you must distribute this negative one to 6x and -4y.

-1 * 6x = -6x

-1 * -4y = 4y

so now we have 5x² - 6x + 4y + 9z*

*the + in front of 9z need not  be changed we are only changing the stuff inside the ()'s

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Area should be 51? (base times height and I divided the shape into two different shapes then added together) and I get 43 for the perimeter...I’m not certain in the perimeter is correct though so I apologize if it is incorrect. I can’t remember if you count the actual bordering red squares or if you only count the while squares AROUND the red squares