solve this linear equation:
(a+4)²-(a-5)² = 9
Answers
Answered by
3
Answer:
Answer is 16
Step-by-step explanation:
(a+4)²-(a-5)²=9
this is a property (a+b)²= a²+2ab+b²
therefore, a²+8a+16-a²-10a +25=9
-2a+41=9
-2a =9-41
-2a= -32
a= -32/-2
a= 16
plz comments this useful or not
Answered by
1
Answer:
(a+4)²-(a-5)²=9
this is a property (a+b)²= a²+2ab+b²
therefore, a²+8a+16-a²-10a +25=9
-2a+41=9
-2a =9-41
-2a= -32
a= -32/-2
a= 16
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