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C equals the square root of 1000 or 31.622776601683793319988935444327...
10*10 = 100 so the answer is 10.
When we say "negative 10 squared," we are asking for the result of squaring the number -10. Squaring a number means multiplying it by itself, so (-10) squared is (-10) x (-10), which equals 100. The negative sign is not squared along with the number itself; it simply indicates that the result is negative.
2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.
(3r + 2)(r - 5)