document.write( "Question 390243: one x-intercept for a parabola is at the point (1,0). use the factor method to find the other x-intercept for the parabola defined by this equation: y=4x^2+4x-8 \n" ); document.write( "

Algebra.Com's Answer #276663 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,        
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document.write( "factoring to find x when y = 0
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document.write( " 4x^2 + 4x - 8 = 0
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document.write( " 4[x^2 + x - 2} = 0
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document.write( " 4[(x-1)(x+2)]= 0 Note:SUM of the inner product(-x) and the outer product(2x) = x
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document.write( " (x-1)(x+2)= 0
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document.write( " (x-1)= 0
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document.write( "    x = 1  already determined:  Pt(1,0) named an x-intercept
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document.write( " (x+2)= 0
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document.write( "    x = -2  Pt(-2,0) the other x-intercept
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