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Alexxx [7]
3 years ago
12

Calcule as seguintes multiplicações:

Mathematics
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

A. 26i

B. 36i^2 + 60x + 25

C. 64x^2 + 112x + 49

Step-by-step explanation:

To get answer in question A, B, and C, use FOIL method

FOIL Method:

(a + b)(c + d) = ac + ad + bc + bd

(pretend x is i)

Question A:

(6 + 4x)(2 + 3x) \\ 12 + 18x + 8x - 12 \\ 26x

Question B:

(5 + 6x)(5 + 6x) \\ {(5 + 6x)}^{2}  =  {36x}^{2}  + 60x + 25

Question C

(7 + 8x)(7 + 8x) \\ {64x}^{2}  + 112x + 49

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