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olchik [2.2K]
4 years ago
9

Any idea on this please help

Mathematics
2 answers:
qwelly [4]4 years ago
8 0
I think it might be 72+0?
nordsb [41]4 years ago
4 0
The roots of a polynomial equation are the values of x that you can plug in so the function is equal to 0. To find the roots, you would want to factor the polynomial and set the factored form equal to zero. 

1) First factor the polynomial. The factored form of  is (x + a)(x + b), where a and b are two numbers that multiply to -72 and add up to 1. By testing numbers that are factors of -72, you can find that 8 x 9 = 72, meaning that either 8 or 9 has to be negative to get -72. But which one of those is negative?

Since you want the two numbers to add up to 1, that means 9 must be positive and 8 must be negative, since -8 + 9 = 1! That makes a and b, 9 and -8. Your factored form would be (x - 8)(x + 9) = 0.

2) Now you want to find values of x where the function is equal to 0. Remember that anything multiplied by 0 is equal to zero. That means you can set each factor, (x - 8) and (x + 9), equal to 0 to find the two values of x (aka the roots)!
Factor 1:x - 8 = 0x = 8
Factor 2:x + 9 = 0x = -9
Your two roots are 8 and -9.
--------
Answer: 8 and -9
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horrorfan [7]
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5 0
3 years ago
Solve for x:<br> 4(2x + 5) - 8 = 36
a_sh-v [17]

Answer:

8x+20-8=36

or,8x+12=36

or,8x=36-12

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so,x=3

5 0
3 years ago
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When you graph a system of linear equations why does the intersection of the tow lines represent the solution of the system?
solniwko [45]

Step-by-step explanation:

step 1. when you graph 2 lines they must intersect unless they are parallel (same slope)

step 2. if they intersect then they have one point in common

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6 0
3 years ago
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slava [35]
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3 0
3 years ago
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-2(x+12)=-x-14 <br> what is the answer to this equation?
shusha [124]

Answer: if you want to know what x is then x = -10

Step-by-step explanation:

−2(x+12)=−x−14

Use the distributive property to multiply −2 by x+12.

−2x−24=−x−14

Add x to both sides.

−2x−24+x=−14

Combine −2x and x to get −x.

−x−24=−14

Add 24 to both sides.

−x=−14+24

Add −14 and 24 to get 10.

−x=10

Multiply both sides by −1.

x=−10

4 0
2 years ago
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