Answer:
a 4
Step-by-step explanation:
4x5=15jddjshshhshsjsjsjsjsjejejsjejejeejjssjsj
Step-by-step explanation:
From the Pythagorean theorem we have:
<em>subtract b² from both sides</em>

Same:

Multiply out
remember thatn (-) times (+)=(-) so
+3 times -4=-12
-12x=0
the only number that will work is 0 since 0 times anything=0
x=0