A) 76 square root of 7
B) 12 square root of 63
C) 28 square root of 7
D) 28 square root of 63
Simplify the expression. square root of 7 + 8 square root of 63?
2008-10-14 4:01 pm
回答 (8)
2008-10-14 4:06 pm
✔ 最佳答案
none of the above. SQRT(7) + 8(SQRT(63)) = SQRT(7) + 8(SQRT(7 * 3 * 3))
=SQRT(7) + 8(3*SQRT(7))
=SQRT(7) + 24 * SQRT(7)
= 25 * SQRT(7)
參考: I'm guessing you forgot a 4 at the beginning
2008-10-14 4:06 pm
B) 12 square root of 63
12*sqrt(3^2 * 7)
12*3*sqrt(7)
36*sqrt(7)
.
12*sqrt(3^2 * 7)
12*3*sqrt(7)
36*sqrt(7)
.
2016-05-26 12:20 pm
4SQRT(7) + 8(SQRT(63)) = 4SQRT(7) + 8(SQRT(7 * 3 * 3)) =4SQRT(7) + 8(3*SQRT(7)) =4SQRT(7) + 24 * SQRT(7) = 28 * SQRT(7) C
2008-10-14 4:23 pm
sr7+9sr63=sr7+9sr7.9=sr7+9sr7.3.3=sr7+9sr7.3*2=sr7+9.3sr7=sr7+27sr7=28sr7
2008-10-14 4:19 pm
√7 + 8√63
= √7 + 8√(3^2 x 7)
= √7 + 8(3)√7
= √7 + 24√7
= √7 * (1 + 24)
= 25√7
= √7 + 8√(3^2 x 7)
= √7 + 8(3)√7
= √7 + 24√7
= √7 * (1 + 24)
= 25√7
2008-10-14 4:17 pm
√7 + 8√63
√7 + 8 (3) √7
√7 + 24√7
25√7
ie NONE of options !!
√7 + 8 (3) √7
√7 + 24√7
25√7
ie NONE of options !!
2008-10-14 4:09 pm
63 = 9(7)
sqrt(63) = sqrt[(9)(7)] = 3 sqrt(7)
sqrt(7) + sqrt(63) = sqrt(7) + 8(3sqrt(7)) = sqrt(7) + 24 sqrt(7) = 25 sqrt(7)
You might have missed something because 25 square root of 7 is not among the choices.
sqrt(63) = sqrt[(9)(7)] = 3 sqrt(7)
sqrt(7) + sqrt(63) = sqrt(7) + 8(3sqrt(7)) = sqrt(7) + 24 sqrt(7) = 25 sqrt(7)
You might have missed something because 25 square root of 7 is not among the choices.
2008-10-14 4:08 pm
sqrt(7) + 8 * sqrt(63)
= sqrt(7) + 8 * sqrt(9) * sqrt(7)
= sqrt(7) + 8 * 3 * sqrt(7)
= 25 * sqrt(7)
= sqrt(7) + 8 * sqrt(9) * sqrt(7)
= sqrt(7) + 8 * 3 * sqrt(7)
= 25 * sqrt(7)
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