Help Solve:?
a: x^2 - 4 = 28
b: 81x^2 = 7
回答 (8)
✔ 最佳答案
a) x^2 - 4 = 28
x^2 = 24
x = sqrt (24)
x = 2 sqrt(6)
b) 81x^2 = 7
x^2 = 7/81
x = sqrt(7/81)
x = sqrt(7) / 9
參考: Grandpa
Question a
x² = 32
x = ± â32
x = ± â(16 x 2)
x = ± 4 â 2
Question b
x² = 7/81
x = ± â7 / 9
a)
x^2 - 4 = 28
x^2 = 28 + 4
x^2 = 32
x = 屉32
x = ±5.65 (approx.)
b)
81x^2 = 7
x^2 = 7/81
x = 屉(7/81)
x = ±2.64/9 (approx.)
a: x^2 - 4 = 28
x^2 = 28+4=32
x^2=2. 16
x=- or + 4sqrt(2)
b: 81x^2 = 7
x^2 = 7/81
x=- or + sqrt(7/81)
a) x^2-4=28
x^2=32
x= +/- sqrt(32)
b) 81x^2=7
9x= +/- sqrt(7)
x= +/- sqrt(7)/9
a. ~5.657
b. ~0.29397
參考: calculator
a. x^2=32
x= (square root of 32)
=4 square root 2
b.
x^2=7/81
x=square root of 7 / 9
no can do dude its summer time
收錄日期: 2021-05-01 10:50:33
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