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1 year ago

HELPPPP which value is equal to 2✓28-5✓63?a-37✓7b-✓7c-11✓7d✓7

Mathematics

1 answer:

IrinaVladis [17]1 year ago

7 0

Answer:

Step-by-step explanation:

if I understand this right, then the expression is

2×sqrt(28) - 5×sqrt(63)

let's look for squared factors in the numbers under the square roots.

28 = 4×7 (4 is a squared number)

63 = 9×7 (9 is a squared number)

so,

2×sqrt(4×7) - 5×sqrt(9×7) =

= 2×2×sqrt(7) - 5×3×sqrt(7) = 4×sqrt(7) - 15×sqrt(7) =

= (4 - 15)×sqrt(7) = -11×sqrt(7)

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HELPPPP which value is equal to 2✓28-5✓63?a-37✓7b-✓7c-11✓7d✓7​

HELPPPP which value is equal to 2✓28-5✓63?a-37✓7b-✓7c-11✓7d✓7