Factorise the following by splitting the middle term.
i) x2 + 2x – 15
ii) y2 – 9y + 14
Answers
Answered by
1
Answer:
1]x=3
2]y=3 or y=7
Step-by-step explanation:
1) x2+2x-15 [by splitting we get 5*3=15]
x2+5x-3x-15=0
x(x+5)-3(x+5)=0
hence answer is x=3 0r x=-5 as the value cannot be negative
Hence ,x=3
2) y2-9y+14=0 [by splitting7*3]
y2-7y+3y+14=0
y(y-7)-3(y-7)
hence y=3 or y=7
Done!
Answered by
2
Answer:
i). x²+2x-15
x²+(5-3)x-15
x²+5x-3x-15
x(x+5)-3(x+5)
(x+5)(x-3)
ii). y²-9y+14
y²-(7+2)y+14
y²-7y-2y+14
y(y-7)-2(y-7)
(y-7)(y-2)
Step-by-step explanation:
Hope this was helpful ☺️
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