Question

7x⁴-2√7x²-15. factorise thid​

Answer 1

Answer:

x² = -1/√7

Step-by-step explanation:

By solve this question by quadratic

By solve this question by quadratic formula

x = -b +- √b²-4ac /2a

so In question a= 7 ,b = 2√7 and c = -15

put the value of in given quadratic formula

x² = -2√7 +- √(-2√7)² - 4(7) / 2(7)

x² = -2√7 +- √28 - 28 /14

x² = -2√7 +- 0/ 14

x² = -2√7/14

x² = -√7 / 7

x² = -1/√7