3x + x^2 when x = -7?

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2007-09-03 20:11:51 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

-21 + 49 = 28

2007-09-07 19:52:30 · answer #1 · answered by Como 7 · 0⤊ 0⤋

3x + x^2 when x = -7

substitute -7 in x

so its 3*(-7) + (-7)^2
= -21 + 49
=28

2007-09-03 20:19:53 · answer #2 · answered by click_here 2 · 0⤊ 0⤋

you plug in -7 for x.

3(-7) + (-7)^2
= -21 + 49
= 28

2007-09-03 20:20:30 · answer #3 · answered by starlight 2 · 0⤊ 0⤋

3(-7)+(-7)² = -21+49=28

2007-09-03 20:20:08 · answer #4 · answered by chasrmck 6 · 0⤊ 0⤋

3*(-7)+(-7)² = -7
-21 + 49 = 28

Squaring a negative number gives you a positive number

2007-09-03 20:18:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋