shadowolf017
12.08.2020 •
Mathematics
Find the term that must be added to the equation x2+4x=1 to make it into a perfect square
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Ответ:
add 4 to each side
Step-by-step explanation:
x^2+4x=1
Take the coefficient of the x term
4
Divide by 2
4/2 =2
Square it
2^2 =4
Add this to each side
x^2+4x +4=1+4
(x+2) ^2 = 5
Ответ:
Step-by-step explanation:
10% of £54=£5.4 (price reduced by 10%)
Normal price should be £5.4 +£54= £59.4