15. Factorise the following.
(i)9x^2+4y^2+16z^2+12xy-16yz-24xz
(ii) 25x² +16y^2 +4z^2 – 40xy +16yz- 20xz
Answers
Answered by
0
9x
2
+4y
2
+16z
2
+12xy−16yz−24xz
=(3x)
2
+(2y)
2
+(−4z)
2
+2(3x)(2y)+2(2y)(−4z)+2(−4z)(3x)
=(3x+2y−4z)
2
=(3x+2y−4z)(3x+2y−4z)
Hence facorise.
Formula:
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
Answered by
0
Answer:
Answer
9x
2
+4y
2
+16z
2
+12xy−16yz−24xz
=(3x)
2
+(2y)
2
+(−4z)
2
+2(3x)(2y)+2(2y)(−4z)+2(−4z)(3x)
=(3x+2y−4z)
2
=(3x+2y−4z)(3x+2y−4z)
Hence facorise.
Formula:
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
Similar questions