Respuesta :

dannielle

Answer:

Step-by-step explanation:

1. x = ✓64*(289-64)=8✓225=8*15=120

2.x=✓144*25=12*5=60

3.x/56=90/36, x/56=5/2, x=56*5/2=28*5

4.21/15=36/x, x=15*36/21

5.x=✓225*64=15*8=120

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