61.
X-4 X-6
+
X-5
x - 7
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Answer:
= (x - 4)(x - 6) + (x - 5)(x - 7)
= x(x - 6) - 4(x - 6) + x(x - 7) - 5(x - 7)
= x^2 - 6x - 4x + 24 + x^2 - 7x - 5x + 35
= x^2 + x^2 - 6x - 4x - 7x - 5x + 24 + 35
= 2x^2 - 22x +59.
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