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secondary 3 | A Maths
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Hi! need help with (d) thanks!
Date Posted: 2 years ago
Views: 434
(d)
(4+√7)•(2+4√7) = (4+√7)•(4-√7)•(a+b√7)
2(4+√7)•(1+2√7) = 9•(a+b√7)
2(18+9√7) = 9•(a+b√7)
2(2+√7) = a + b√7
4 + 2•√7 = a + b√7
⇨
a = 4
b = 2
(4+√7)•(2+4√7) = (4+√7)•(4-√7)•(a+b√7)
2(4+√7)•(1+2√7) = 9•(a+b√7)
2(18+9√7) = 9•(a+b√7)
2(2+√7) = a + b√7
4 + 2•√7 = a + b√7
⇨
a = 4
b = 2
See 3 Answers
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Part (a)
Date Posted:
2 years ago
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Part (d)
Date Posted:
2 years ago
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