maxi12312345
20.09.2019 •
Mathematics
Apply your knowledge of square roots to solve equations involving them. show your step-by-step solution. remember, each problem should have two solutions.
(7x-2)^2 = 256
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Ответ:
(7x-2)^2=256
sqrt both sides
7x-2=+/-16
add 2 to both sides
7x=2+/-16
divdide both sides by 7
x=(2+/-16)/7)
x=(2+16)/7=18/7=2 and 4/7
x=(2-16)/7=-14/7=-2
x=2 and 4/7 or -2
Ответ:
because 9 goes into 11 twice and 9 goes into 28 3 times