Can u slove these equations? 10PTS!!!
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Can u slove these equations? 10PTS!!!

[From: ] [author: ] [Date: 11-08-14] [Hit: ]
......
what is equivalent to (5x+1) (3x+5)

the square root of (2x-5)to the 2nd power=13

Where does the graph of f(x)= xto the 2nd power+5x- 14 cross the x-axis

what are the roots to the equation? xto the 2nd power+4x-21=0

-
(5x + 1)(3x + 5) = 15x^2 + 28x + 5

The square root of anything to the second power is just that anything, so the second equation becomes 2x - 5 = 13
2x = 13 + 5
2x = 18
x = 9

x^2 + 5x - 14 = 0
(x - 2)(x + 7) = 0

The graph crosses the x - axis (the y-value is zero) at x = 2 and x = -7

x^2 + 4x - 21 = 0
(x + 7)(x - 3)
The roots are x = -7 and x = 3
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