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gayaneshka [121]
3 years ago
6

Can someone give me the answer and explain plz

Mathematics
2 answers:
Bezzdna [24]3 years ago
5 0

Answer:

\boxed{\sf - ({x}^{2}    + 9x  + 9 )}

Step-by-step explanation:

\sf Simplify  \: the \:  following: \\  \sf \implies - 2(4 {x}^{2}  + 6) + (7 {x}^{2}  - 9x + 3) \\  \\  \sf  - 2(4 {x}^{2}  + 6) =  - 8 {x}^{2}  - 12  : \\  \sf \implies - 8 {x}^{2}  - 12 + 7 {x}^{2}  - 9x + 3 \\  \\  \sf Grouping  \: like \:  terms :  \\  \sf \implies ( - 8 {x}^{2}  + 7 {x}^{2} ) - 9x + ( - 12 + 3) \\  \\  \sf 7{x}^{2}  - 8 {x}^{2}  =  -  {x}^{2}  : \\  \sf \implies  - {x}^{2}   - 9x + ( - 12 + 3) \\  \\  \sf 3 - 12 =  - 9 :  \sf \implies  - {x}^{2}   - 9x - 9 \\  \\  \sf Factor  \:  - 1 \:  out \:  of  \:  - {x}^{2}   - 9x - 9: \\   \sf \implies  - ({x}^{2}    + 9x  + 9 )

s2008m [1.1K]3 years ago
5 0

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{ -  {x}^{2}  - 9x - 9}}}}}

Step-by-step explanation:

\sf{ - 2(4 {x}^{2}  + 6) + (7 {x}^{2}   - 9x + 3)}

When there is a ( + ) in front of an expression in parentheses, there is no need to change the sign of each term in the expression. That means, the expression remains the same. Also, remove the unnecessary parentheses

⇒{ \sf{ - 2(4 {x}^{2}  + 6) + 7 {x}^{2}  - 9x + 3}}

Distribute -2 through the parentheses

⇒\sf{ - 2 \times 4 {x}^{2}  + ( - 2)  \times 6 + 7 {x}^{2}  - 9x  + 3}

⇒\sf{ - 8 {x}^{2}  + ( - 12) + 7 {x}^{2}  -  9x + 3}

We know that , \sf{( + ) \times ( - ) = ( - )}

⇒\sf{ - 8 {x}^{2}  - 12 + 7 {x}^{2}  - 9x + 3}

Collect like terms

⇒\sf{ - 8 {x}^{2}  + 7 {x}^{2}  - 9x - 12 + 3}

The negative and positive terms / integer are always subtracted but possess the sign of the bigger term / integer

⇒\sf{ -  {x}^{2}  - 9x - 12 + 3}

Subtract 3 from 12

⇒\sf{  - {x}^{2}  - 9x - 9}

Hope I helped!

Best regards! :D

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valkas [14]

Answer:

No real solutions

Step-by-step explanation:

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scoray [572]

Answer:

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Step-by-step explanation:

A triangle is 180 degrees total. One angle is 25 degrees. 180- 25 leaves us with 155 degrees. We know that one angle is more than 65 degrees. 155-65 is 90. 90/2 is 45. Therefore, x= 45. Angle A: 45, Angle B: 110, and Angle C: 25. We can double check our work by adding 45+110+25= 180

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vovikov84 [41]

Answer:

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Step-by-step explanation:

So, I encourage you to grab a calculator and see for yourself

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Another analogy that can be used is seeing the fraction as a real-life object.

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3 out of 5 slices are left of Pie 1.

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Hope this has helped!

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Step-by-step explanation:

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