Question

If a + b = 4 and a – b = 3, then a 2 + b 2 = _______

Answer 1

• a+b =4. a-b=3.
• Hence. a=3.5 b =0.5
• a2 + b2 = (a+b)2 -2ab
• = (4)2 - 2x3.5x0.5=16 - 3.5= 12.5

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Answer 2

Answer:

plz refer to the attachment

Step-by-step explanation:

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