Can anyone help me?
In math we are currently calculating products and sums.
Is it correct?
Task (2a + b +6) × (a +8)
Result 2a²+ab+6a + 8a + 8b + 14
(1 votes)
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Hallo,
ist falsch.
Rechne erst jedes Glied von Klammer 1 mal a, danach jedes mal 8:
2a²+ab+6a+16a+8b+48.
6a+16a kannst Du zu 22 a zusammenfassen:
2a²+ab+22a+8b+48.
Herzliche Grüße,
Willy
Nein, das ist nicht richtig, da muss man nur den letzten Term ansehen und der muss 6·8 = 48 ergeben. Warum Du da addierst, verstehe ich jetzt nicht.
Wenn Dir sowas schwerfällt, dann mach einen Zwischenschritt:
Das noch etwas zusammenfassen kannst Du nun selber.
Nein. Die ersten 3 Terme stimmen, die anderen nicht.
2a²+ab+6a+8*2a+8b+8*6
= 2a²+ab+6a+16a+8b+48
= 2a²+ab+22a+8b+48
Nein falsch!
Die ersten drei deines Ergebnisses sind noch richtig, aber der Rest nicht mehr da muss es weiter heißen: 2a*8 also 16a plus 8b passt wieder plus 6*8 also 48. Dann noch die Teilterme mit a zusammen fassen.
Nein. Richtig ist
2a²+ab+6a + 16a +8b + 48
Am Ende hast du 6+8 statt 6*8 berechnet.