How do you solve 19-21?

Answer for question 19:

→ Step -1: Factor left side of equation:

→ Step 2: Set factors equal to 0:

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Answer for question 20:

→ Step -1: Add 13 to both sides:

→ Step 2: Take square root:

+

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Answer for question 21:

→ Step 1: Factor left side of equation:

→ Step 2: Set factors equal to 0:

Answers for the following question:

Question 19:  x = -1 or x = -2

Question 20: x = 4 or x = -4

Question 21: x = 2 or x = -14

Step-by-step explanation:

For question 19:

= (x+1)(x+2)=0

= x+1=0 or x+2 =0

x = -1 or x = -2

For question 20:

x² - 13 + 13 = 3 + 13

x² = 16

x =  

x = 4 or x = -4

For question 21:

(x-2) (x+14) = 0

x - 2 = 0 or x +14 = 0

x = 2 or x = -14

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

10cm

step-by-step explanation:

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