Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**mom****Member**- Registered: 2012-04-25
- Posts: 94

Please let me know if I did this correctly.

I have Let A = [1 4] and B = [3 -2]. find the entry in the second row, first column of AB.

2 3 4 6

I multiplied A and B to get AB and the number I got for the second row, first column of AB was 18. Did I do this correctly?

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,012

That looks good to me.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mom****Member**- Registered: 2012-04-25
- Posts: 94

Bob,

nice! thanks so much for checking it for me.

Offline