Q1 of 52 Page 131

Let's resolve into factors by expressing the algebraic expression (a2 – a – 72) and (2x2 – x – 1) as the difference of two squares.

(a2 – a – 72)











= ( a – 9) (a + 8)


Now (2x2 – x – 1)


This can be written as:











More from this chapter

All 52 →
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