Mathematics
26.08.2020 23:46
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Can someone explain the pattern in the picture?
Can someone explain the pattern in the picture?
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blakestuhan
4,5(99 marks)
At first you have 1 and then 1 and 1 and you know that 1+1=2 so you have 1, 2, 1, and then you know that 1+2=3 and Β 2+1=3 so yu have 1,3,3,1 and then you know that 1+3=4 and 3+1=4 so you have 1,4,4,1 and it goes like that until the end.
jyow6688
4,7(43 marks)
(2x^2-4x-3)(3x+1)
Expand
(2x^2+β4x+β3)(3x+1)
Cross multiply
(2x2)(3x)+(2x^2)(1)+(β4x)(3x)+(β4x)(1)+(β3)(3x)+(β3)(1)
Simplify6x^3+2x^2β12x^2β4xβ9xβ3
Simplify6x^3β10x^2β13xβ3Β is your answer
Expand
(2x^2+β4x+β3)(3x+1)
Cross multiply
(2x2)(3x)+(2x^2)(1)+(β4x)(3x)+(β4x)(1)+(β3)(3x)+(β3)(1)
Simplify6x^3+2x^2β12x^2β4xβ9xβ3
Simplify6x^3β10x^2β13xβ3Β is your answer
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