Using the quadratic formula to solve 2x2 = 4x – 7, what are the values of x? a
StartFraction 2 plus-or-minus StartRoot 10 EndRoot i Over 2 EndFraction

b
1 plus-or-minus StartRoot 5 EndRoot i

c
2 plus-or-minus StartRoot 10 EndRoot i

d
1 plus-or-minus StartRoot 10 EndRoot i

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629

on the middle line

step-by-step explanation:

1/5=50