Question

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1) ( x + 8 ) ( x – 8 ) =
2) ( 5 + 4a ) ( 5 – 4a ) =
3) ( 10x + 5y ) ( 10x – 5y ) =
4) ( 2x + 9 ) ( 2x – 9 ) =
5) ( 6x + 10y ) ( 6x – 10y ) =
6) ( 7a + 6b ) ( 7a – 6b ) =
7) ( 4a + 7b) ( 4a – 7b) =
8) ( 8x + 11y ) ( 8x – 11y) =
9) ( 2 + 12y ) ( 2 – 12y) =
10) ( 5b + 9 ) ( 5b – 9) =

Answer 1

Resposta:Segue as contas abaixo na explicação

Explicação passo-a-passo:

1) ( x + 8 ).( x – 8 ) = x²-8x+8x-64-->x²-64

2) ( 5 + 4a ).( 5 – 4a ) = 25-20a+20a-16a²-->25-16a²

3) ( 10x + 5y ).( 10x – 5y ) = 100x²-50xy+50xy-25y²-->100x²-25y²

4) ( 2x + 9 ).( 2x – 9 ) = 4x²-18x+18x-81-->4x²-81

5) ( 6x + 10y ).( 6x – 10y ) = 36x²-60xy+60xy-100y²-->36x²-100y²

6) ( 7a + 6b ).( 7a – 6b ) = 49a²-42ab+42ab-36b²-->49a²-36b²

7) ( 4a + 7b).( 4a – 7b) = 16a²-28ab+28ab-49b²-->16a²-49b²

8) ( 8x + 11y ).( 8x – 11y) = 64x²-88xy+88xy-121y²-->64x²-121y²

9) ( 2 + 12y ).( 2 – 12y) = 4-24y+24y-144y²-->4-144y²

10) ( 5b + 9 ).( 5b – 9) =25b²^-45b+45b-81-->25b²-81