pls answer the ticked ones.factorize them Q15. 3 – 5x + 5y – 12(x – y)2 Q16. 9x2 + 3x – 8y – 64y2 Q18. 1 4 a + b 2 - 9 16 2 a - b 2 Q20. Find the value of : (i) ( 987)2 – (13)2 (iii) 6 . 7 2 - 3 . 3 2 6 . 7 - 3 . 3 Share with your friends Share 1 Varun Rawat answered this 18. 14a+b2 - 9162a-b2=12a+b2 - 342a-b2=12a+b +342a-b12a+b -342a-b=a2 + b2 + 3a2 - 3b4a2 + b2 - 3a2 + 3b4=2a+2b+6a-3b42a+2b-6a+3b4=1168a-b-4a+5bUsing identity : x2 - y2 = x+yx-y20.i. 9872 - 132=987+13987-13 Using identity : x2 - y2 = x+yx-y=1000 × 974=974000ii. 6.72 - 3.326.7 - 3.3=6.7+3.36.7-3.36.7-3.3 Using identity : x2 - y2 = x+yx-y=6.7+3.3=10Kindly ask the remaining queries in different threads. 0 View Full Answer