492 Activity 6 The square of the difference of two positive numbers is twice their product subtracted from the sum of their squares, (x-y) x?+y2-2xy (50-1)2 = 50+12-2x50x 1 2500+1-100 2401 Using this, find a) 392 b) 992 c) 182 11 11
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Sunbirds are colourful pollinators of many plants. Flowers pollinated by sunbirds are often red or orange and have long tubular flowers with lots of sugary nectar. Sunbirds also feed on insects that visit flowers.
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