If x=3 is a solution of the equation 2x²-5x+k=0 find the value of k
2 answers:
Answer:
k = - 3
Step-by-step explanation:
Given that x = 3 is a solution then it satisfies the equation, that is
2(3)² - 5(3) + k = 0
2(9) - 15 + k = 0
18 - 15 + k = 0
3 + k = 0 ( subtract 3 from both sides )
k = - 3
Answer: k = -3
Step-by-step explanation:
2x²-5x+k=0
Substitute x=3
2(3)^2-5(3)+k=0
2(9)-15+k=0
18-15+k=0
3+k=0
k=-3
To check if your answer is correct you can substitute x=3 and k = -3
2(3)^2-5(3)-3=0
2(9)-15-3=0
18-15-3=0
3-3=0
So k = -3 is correct
You might be interested in
Answer:
Step-by-step explanation:
I not 100% sure but I chose C.
Hope this helps.. but good luck :)
Answer:
Step-by-step explanation:
<h3>Given</h3>
<h3>To find</h3>
<h3>Solution</h3>
Area formula
A = lw A= 5w*w= 5w² 5w² = 500 w²= 100 w = √100 w = 10 m Then
Answer:
The pizza that is a better deal is 12" square pan pizza for $3.95.
Step-by-step explanation:
This is because if you get 2 of the 12" square pan pizzas it will be 24" and you will only have to pay $7.90. but if you bought the 24" square pan pizza you would have to pay $14.95 which isnt a fair price.
Answer: gcf, hcf, gcd (42; 112) = 14 = 2 × 7: greatest (highest) common factor (divisor), calculated.
Step-by-step explanation:
