2-11-4

Using Verify

(4) Following the equal sign (=), input 25 σ 3 and tap U.

(5)Tap [OK] to close the error dialog that appears.

(6)Change 25 σ 3 to 25 σ 2 and tap U.

(7)Following the next equal sign (=), input 5 σ 5 σ 2 and tap U.

Example 2: To rewrite x2 + 1 in factored form

(1)Tap the left most toolbar icon to begin a new Verify session.

(2)Tap [OK] to clear the window.

(3)Tap the down arrow on the toolbar and select .

(4)Input x^2 + 1 and press .

(5)Input (x + i)(x i) and press .

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