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Colt1911 [192]
3 years ago
9

Is x=-2 a solution for the equation below?

Mathematics
2 answers:
iren2701 [21]3 years ago
6 0

Answer:

x= -2

-7 +x^2 - 3x = 9 +x - 10

-7 + (-2)^2 -3×(-2) = 9 + (-2) -10

-7 +4 +6 = 9 - 2 - 10

-7+10=9-12

3 =-3

Don't blame me if this is incorrect:)

Misha Larkins [42]3 years ago
3 0

Answer:

no

Step-by-step explanation:

-7+x^2-3x      =       9+x-10

-7+(-2)^2-3*(-2)                   9+(-2)-10

-7+4+6                                9-12

3                   >                      -3

if we substitute -2 to x, answer is not equal

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Thanks for helping...
slava [35]

Answer:

16

Step-by-step explanation:

Subtracting the given expressions, that is

3b² - 8 - (b(b² + b - 7) ) ← simplify parenthesis

= 3b² - 8 - (b³ + b² - 7b) ← distribute parenthesis by - 1

= 3b² - 8 - b³ - b² + 7b ← collect like terms

= - b³ + 2b² + 7b - 8 ← substitute b = - 3

= - (- 3)³ + 2(- 3)² + 7(- 3) - 8

= - (- 27) + 2(9) - 21 - 8

= 27 + 18 - 21 - 8

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7 0
3 years ago
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5 0
3 years ago
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Solve and graph 4<-1/3n
Liula [17]

Answer:

n<-12

Step-by-step explanation:

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5 0
3 years ago
Which of the following expressions is equal to g(x)?
Tatiana [17]

Answer:

Option D is right

Step-by-step explanation:

Given are two graphs.  The first one is given as

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The second one equation we have to find out.

Option A given as

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This has x intercept as (0,2).  Since does not match with g(x) not correct

OPtion C:

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Here x intercept = 1 matches with ours.

Also g(2) = 2, twice as that of original f(x)

Hence option C is not  right

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3 0
3 years ago
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4 years ago
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