2x (3x-3) +7 (1+6x)
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Answer:
Step-by-step explanation:
→ 2x(3x-3) + 7(1+6x)
→ 2x × 3x - 2x × 3 + 7 × 1 + 7 × 6x
→ 6x² - 6x + 7 + 42x
→ 6x² - 6x + 42x + 7
→ 6x² - 36x + 7
→ 6x² - 36x + 7 = 0
→ a = 6 , b = 36 , c = 7
→ Now using quadratic formula :
→ x = [-b ± √(b²-4ac)]/2a
→ x = [-36 ± √(36)² - 4(6)(7)]/2(6)
→ x = [-36 ± √1296 - 168] / 12
→ x = [-36 ± √1128] / 12
→ x = [-36 ± 33.58] / 12
→ x = -2.42 / 12
→ x = -0.201
Answered by
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Answer:
=6x^2-6x+7+42x
=6x^2-6x+42x+7
=6x^2+36x+7answer
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