Mathematics, 31.01.2020 06:01 aletadaboss
Complete the square to solve the equation below. x^2 + 2x - 14 = 10 a. x = 5; x = -4 b. x = -1; x = 4 c. x = -1; x = 3 d. x = -6; x = 4
Answers: 3
![x^2+2x-14=10\\\\\Rightarrow x^2+2x=10+14\\\\\Rightarrow x^2+2\times x\times1+1^2=24+1^2\\\\\Rightarrow (x+1)^2=24+1\\\\\Rightarrow (x+1)^2=25\\\\\Rightarrow x+1=\pm\sqrt{25}~~~~~~~~~~~~~~~~~~~~~~~~~~~~`[\textup{taking square root on both sides}]\\\\\Rightarrow x+1=\pm5\\\\\Rightarrow x=-1\pm5\\\\\Rightarrow x=-1+5,~-1-5\\\\\Rightarrow x=4,~-6.](/tpl/images/0488/7266/eafdc.png)
Another question on Mathematics
Mathematics, 21.06.2019 13:30
Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?
Answers: 3
Mathematics, 21.06.2019 14:30
Consider a graph for the equation y= -3x+4. what is the y intercept? a) 4 b) -4 c) 3 d) -3
Answers: 1
Mathematics, 21.06.2019 18:20
What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)
Answers: 2
Mathematics, 21.06.2019 22:30
Need this at the city museum, child admission is 6 and adult admission is 9.20. on tuesday, 132 tickets were sold for a total sales of 961.60. how many adult tickets were sold that day?
Answers: 1
You know the right answer?
Complete the square to solve the equation below. x^2 + 2x - 14 = 10 a. x = 5; x = -4 b. x = -1; x...
Questions
Mathematics, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
Biology, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
Mathematics, 10.03.2022 03:00
English, 10.03.2022 03:00
Mathematics, 10.03.2022 03:10
Mathematics, 10.03.2022 03:10
