Answer:
(x+2)(x-2)
Step-by-step explanation
x times x equals x^2, 2 times x equals 2x, -2 times x equals -2x, and 2 times -2 equals -4. If you add that up, the x-values cancel out, leaving the x^2 and the -4. (This explanation is working it backwards which is the easiest way IMO)
x=4
Step-by-step explanation:
1+3x=2x+5
4=x
Answer: 6
n - 7 = 21, n= 28 should be right bc the difference of 28 and 7 is 21
sorry bro don't read Spanish but it's not over 3
