Answer: m²-9mn+2n²
Step-by-step explanation: make use of BODMAS strategy. Let the unknown be x.
-7mn+2m²+3n²-x= m²+2mn+n². Since we are concerned about getting the unknown,let's try to collect the like terms.
-7mn+2m²+3n²-(m²+2mn+n²)= x
-7mn+2m²+3n²-m²-2mn-n²= x
-7mn-2mn+2m²-m²+3n²-n²=x
-9mn+m²+2mn= x
X= m²-9mn+2n²
8 times (4 + 5 + 7) evaluate.
8 × (4 + 5 + 7)
<span>8 × (16)
</span>128
<span>8 times (4+5+7) is 128. </span>
I believe it is y= -x + 4
Answer:
120 is the right answer . mark as brainliest
