4 years ago

Solve x^2+ 3x = 28 Solve question

Mathematics

1 answer:

mr_godi [17]4 years ago

3 0

Answer: x=4 or x=−7

Step-by-step explanation:

Because.....

Step 1: Subtract 28 from both sides.

x^2+3x−28= 28 − 28

x^2+3x−28 = 0

Step 2: Factor left side of equation.

(x−4)(x+7)=0

Step 3: Set factors equal to 0.

x−4=0 or x+7=0

x=4 or x=−7

* You could use any of the answers.

* Hopefully this helps:) Mark me the brainliest:)!!!

You might be interested in

Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the

cupoosta [38]

1 m = 100 cm....so 2.5 m = (2.5 * 100) = 250 cm

a = 1st shelf
b = 2nd
c = 3rd
d = 4th

a + b + c + d = 250
b = 2a + 18
c = a - 12
d = a + 4

a + (2a + 18) + (a - 12) + (a + 4) = 250
5a + 10 = 250
5a = 250 - 10
5a = 240
a = 240/5
a = 48 cm <== 1st shelf

b = 2a + 18 = 2(48) + 18 = 114 cm <== 2nd shelf
c = a - 12 = 48 - 12 = 36 cm <== 3rd shelf
d = a + 4 = 48 + 4 = 52 cm <== 4th shelf

so 2nd shelf is 114 cm

7 0

3 years ago

Read 2 more answers

1 through 8 what is the probability of landing on an even number

umka21 [38]

Answer:

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Why does this series converge? ∞ ∑ (n+1)/[(n)(n+2)(n+3)] n=1

ollegr [7]