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IRINA_888 [86]
3 years ago
7

Solve the quadratic equation. x2+2x−8=0

Mathematics
2 answers:
Svetradugi [14.3K]3 years ago
5 0

Answer:

x=2 or x=-4

Step-by-step explanation:

ax^2+bx+c=0

when solving this equation you should find two numbers that if we multiply them we get c and when we subtract them we get b so in this equation we get 2 and -4

natta225 [31]3 years ago
3 0

Answer:

x=2 x=-4

Step-by-step explanation:

x2+2x−8=0

Step 1: Factor left side of equation.

(x−2)(x+4)=0

Step 2: Set factors equal to 0.

x−2=0 or x+4=0

x=2 or x=−4

Answer:

x=2 or x=−4

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Solve the system of linear equations by substitution.<br><br> 5x+2y=9<br><br> x+y=-3
Hatshy [7]
Step 1: subtract x from -3. New equation should be y=-3-x.
Step 2: plug that equation into top equation. Should be 5x + 2(-3-x) = 9.
Step 3: use distribitive properties on 2(-3-x). New equation is 5x - 6 - 2x = 9.
Step 4: combine like terms. New equation 3x - 6 = 9.
Step 5: work it out. Divide 3x and 9 by 3. New equation is x - 6 = 3. Add 6 to -6 and 9. Final eqaution is x = 9.
Step 6: swap 9 for x in second equation. New equation is 9 + y = -3
Step 7: subtract 9 from 9 and -3. New equation is y = -12
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8 0
3 years ago
Find the height of a cuboid whose volume is 540cu.cm and base area is 90sq.cm
grandymaker [24]

Answer:

6 cm

Step-by-step explanation:

Vcuboid  = lwh

⇒ h = Vcuboid ÷ lw

∴  h = 540 cm³ ÷ 90 cm²

⇒ h = 6 cm

6 0
3 years ago
Whats 48528×3647÷(286+51)=​
serious [3.7K]

Answer:

525168

Step-by-step explanation:

48528×3647÷(286+51)

parenthesis first

48528×3647÷ 337

calculate the expression

525168

8 0
3 years ago
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What is the range of 0, 0, 4, 6, 6, 8
earnstyle [38]
Your range is 8

take your largest minus the smallest

8-0=8

hope this helps
3 0
3 years ago
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in a class of 25 students, 18 have brown eyes. if two students are chosen at random, what is the probability that they both have
Greeley [361]
=153/300
=.51
The probability is .51 or 153/300
4 0
3 years ago
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