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### Grade 8 - Mathematics7.15 Solving Problems Using Formula for (a+b)2 - II

 Example: Find the value of (21)2 using formula. Solution: We can write (21)2 = (20+1)2. This is the form of (a+b)2 = a2 + 2ab + b2. = (20)2 + 2.20.1 + 12 = 400 + 40 + 1 = 441 Directions: Solve the following problems using the formula and show your work. Also write at least ten examples of your own.
 Q 1: Find the value of (31)2 using formula.861900961 Q 2: Find the value of (201)2 using formula.202014040140501 Q 3: Find the value of (54)2 using formula.67697242916 Q 4: Find the value of (26)2 using formula.676678674 Q 5: Find the value of (41)2 using formula.18116812061 Q 6: Find the value of (553)2 using formula.305809204304123201 Q 7: Find the value of (82)2 using formula.672429161681 Q 8: Find the value of (351)2 using formula.1230113201123201 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!