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### Grade 8 - Mathematics7.17 Solving Problems Using Formula for (a-b)2

 Example: Find the value of (48)2 using formula. Solution: We can write (48)2 = (50-2)2 This is the form of (a-b)2 = a2 - 2ab + b2 = (50)2 + 2.50.2 + 22 = 2500 - 200 + 4 = 2504 - 200 = 2304 Directions: Solve the following problems using the formula. Also write at least ten examples of your own.
 Q 1: Find the value of (28)2 using formula.984884784 Q 2: Find the value of (78)2 using formula.608498013364 Q 3: Find the value of (99)2 using formula.603498013304 Q 4: Find the value of (199)2 using formula.394013950139601 Q 5: Find the value of (79)2 using formula.624160843364 Q 6: Find the value of (249)2 using formula.630016500162001 Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!

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