2 years ago

Simplify -3(3x^2+2y-5)-2(x^2-3x)

Mathematics

2 answers:

Luda [366]2 years ago

8 0

Answer:

$-11x^2 + 6x - 6y + 15$ will be your answer!

Step-by-step explanation:

$-3(3x^2 + 2y - 5) -2(x^2-3x)$

$-9x^2 - 6y + 15 - 2x^2 + 6x$

$-11x^2 + 6x - 6y + 15$

Sorry if I took too long to answer.

inn [45]2 years ago

5 0

Answer:

=7x^2+6x+6y-15

Step-by-step explanation:

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1) Expand and simplify the following:<br>a)3(x squared plus 3x cubed - 2)

Musya8 [376]

Answer:

3x³ + x² - 2

Step-by-step explanation:

a) 3(x squared plus 3x cubed - 2)

x squared = x²

3x cubed = 3x³

3(x squared plus 3x cubed - 2)

= 3(x² + 3x³ - 2)

= 3x² + 9x³ - 6

Rearrange according to power

= 9x³ + 3x² - 6

When the expression is divided by 3, it is equivalent to

3x³ + x² - 2

5 0

3 years ago

I need help on this???

Aliun [14]

Use the geometric mean for right triangles here. Like this $\frac{9}{y}= \frac{y}{7}$ . Cross multiply to get $y^{2}=63$ , and $y= \sqrt{63}$ . That simplifies down to $y= \sqrt{9*7}$ . Pull out the 9 as a perfect square of 3 and you're left with $y=3 \sqrt{7}$ , first choice above.

4 0

3 years ago

Read 2 more answers

Need the answers for a test ASAP

jeka57 [31]

Answer:

It is the last option

Step-by-step explanation:

7 0

2 years ago

How do i determine if lines are parallel, perpendicular or neither?<br><br> -3y=5x-1<br> 6x=10y-12

zimovet [89]