4.2? – 4.3 22 +43 - 5
This is her work:
Factoring the numerator: 4x2 - 4x = 4x(x - 1)
Factoring the denominator: x2 + 4x – 5 = (x + 5)(x - 1)
Finding excluded values: 2 +0,2 # 1, and 2 € -5
Reducing to lowest terms:
4.x2 - 41
x² + 4x - 5
42(x)
(x + 5)(x - 1)
4.2
3 + 5
What mistake did Isabel make?

Hel

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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