Asked by Debby
complete the brackets which as left emty in each of the following (show working out)
A).(2x-3)^2-3x= (x-3)( )
B).(x^2-4)+(x+2)^2= (x+2) ( )
A).(2x-3)^2-3x= (x-3)( )
B).(x^2-4)+(x+2)^2= (x+2) ( )
Answers
Answered by
Reiny
(2x-3)^2-3x
= 4x^2 - 12x + 9 -3x
= 4x^2 - 15x + 9)
= (x-3)(4x - 3)
(x^2-4)+(x+2)^2
= (x-2)(x+2) + (x+2)(x+2)
= (x+2)(x-2 + x+2)
= (x+2)(2x)
= 4x^2 - 12x + 9 -3x
= 4x^2 - 15x + 9)
= (x-3)(4x - 3)
(x^2-4)+(x+2)^2
= (x-2)(x+2) + (x+2)(x+2)
= (x+2)(x-2 + x+2)
= (x+2)(2x)
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