help i dont understand this lesson !
2007-09-12 15:18:11 · 11 answers · asked by Angiee 2 in Science & Mathematics ➔ Mathematics
(- 10 ) ² = (- 10) x (- 10) = 100
2007-09-14 11:36:26 · answer #1 · answered by Como 7 · 2⤊ 0⤋
-2 times 5 = -10
-10^2 = 100
2007-09-12 15:22:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Well a negative(-) times a positive(+) is a negative.
You just do the multiplication of 2 x 5 and put in the negative sign, so -2 x 5 = -10
then to square it you do -10x -10. Since a negative times a negative is a possitive you can ignore the signs and 10 x 10=100
the answer is 100
2007-09-12 16:47:59 · answer #3 · answered by angela 1 · 0⤊ 1⤋
100
2007-09-12 15:22:44 · answer #4 · answered by chuck0373 2 · 0⤊ 1⤋
(-2 * 5)²
-10²
100
2007-09-12 15:31:14 · answer #5 · answered by The Glorious S.O.B. 7 · 0⤊ 0⤋
1. a^2 - 8a = - 15 Solution: a^2 - 8a + 15 = 0 (a - 3) (a - 5) = 0 2. y^2 + 6y = 7 Solution: y^2 + 6y - 7 = 0 (y + 7) (y - 1) = 0 3. k^2 - 10 = - 9k Solution: k^2 - 10 + 9k = 0 (k - 9) (k - 1) = 0 4. w^2 = 13w Solution: w^2 - 13w = 0 w (w - 13) = 0 5. 11x = -x^2 - 24 Solution: 11x + x^2 + 24 = 0 x^2 + 11x + 24 = 0 (x + 8) (x +3) = 0
2016-05-18 02:10:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It means (-2 x 5)^2 ie squared
So (-2 x 5) = (-10)^2 = 100
2007-09-12 15:22:05 · answer #7 · answered by charonnisis 3 · 1⤊ 0⤋
(-2x5) = -10 to the second so it's 100
2007-09-12 15:39:19 · answer #8 · answered by goofygoober 2 · 0⤊ 1⤋
(-2 x 5)^2
First: combine terms in the parenthesis.
(-10)^2
Sec: eliminate the exponent - multiply (-10) by itself, twice.
*When you multiply two negative numbers, the solution is always positive.
(-10)(-10) = 100
2007-09-12 15:39:53 · answer #9 · answered by ♪♥Annie♥♪ 6 · 2⤊ 0⤋
100 ! Good luck.... i'm 8th grader
2007-09-12 15:38:15 · answer #10 · answered by iHeartChem 2 · 0⤊ 0⤋