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Effectus [21]
3 years ago
8

Solve 4r2 – 16 = 84. {±4} {±3} {±6} {±5}

Mathematics
1 answer:
Marta_Voda [28]3 years ago
4 0
4r²<span>– 16 = 84
4r</span>² = 84+16
4r²= 100
r²=25
r=√25
r=<span>±5</span>
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