Question

(a+ root b)(c+ root d)

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Answer 1

Answer:

$(a+ \sqrt{b} )(c+ \sqrt{d} ) \\=a(c+ \sqrt{d} )+ b(c+ \sqrt{d} ) \\=ac+a \sqrt{d} +c \sqrt{b} + \sqrt{b} d$

Answer 2

(a + √b) (c + √d)

= a(c + √d) + √b(c + √d)

= ac + a√d + c√b + √bd

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